6 Port Supra B58 Big Turbo Options

[shaloot]

UPDATED POST 10/30/2025 ~~~~~~~~~~~~


Tubular manifold / external wastegate kits:


Vargas VTT-FAB top mount: $10,582

No cat options, no coatings, recirc single WG, factory boost / WG controller. No catch can. 6 into 1 manifold V-band, not twin scroll. Factory WG control very close to heat, need to watch to see if anyone buys and runs this kit.

https://vargasturbo.com/product/vtt-fab-b58-factory-control-ewg-top-mount-single-turbo-kit/



KLM top mount: $10,232, but they offer me sale price before turbo 30% increase which would be $9K as of 5/8/2025.

With $1K cat option, dual WG, very widely used. Included catch can in this price (450). No BOV anymore.

A90/91 Supra 6-Port Turbo Kit - KLM Race



ETS: $9298 with BOV 6870 Next Gen. comparable to KLM. Seems like the most complete kit, has additional support bracing on manifold, downpipe, and dump tubes. They will weld in a cat for around $900 as an option as per sales department.

https://www.extremeturbosystems.com/products/ets-2021-a90-a91-supra-b58-6-port-next-gen-turbo-kit



Full Race: $8555

Site has very good diagram of kit. Partner of Titan.

https://titanmotorsports.com/produc...pra-6-port-top-mount-twin-scroll-t4-turbo-kit



Doc Race tubular turbo kit: $6200 next gen 6870. No cat option. Silicone connections not HD clamps. Need to contact sales to see if cat is an option. This is cheapest tubular top mount option so far.

https://docrace.com/products/2021-a90-a91-6-port-supra-top-mount-turbo-kit



P2uned tubular turbo kit: $7480 G35-1050 Garrett WATER COOLED turbo.

No cat option? Need to ask if they will add one. P2uned widely used on drag setups. Also offer other pro series and some other kits on site.

P2uned B58 Series 1 Turbo Kit | p2uned.com



Walton 6870: $7900? Varies depending on options.

Over in UK. Works with Osprey. They couldn’t provide me with Supra fitment details since they mostly run on BMW’s so far but this is a newish kit.

Walton offers WG vent to atmosphere if wanted, or recirculated.
Huge single wastegate port on 6-into-1 non twin scroll V band manifold. Can use factory WG controller with straight gate.



Turbo Manifold BMW B58 - Big Turbo High Mount – Walton Motorsport

Walton Top Mount Turbo kit | Osprey



ViEngineered: $7500 tubular 6-into-1 single wastegate! Found on this YouTube video:

https://viengineered.net/



RK Autowerks: $8,248 top mount tubular external WGs

Price is with GARRETT GXR40-64

https://www.rkautowerks.com/index.php/product/rk-autowerks-b58-single-turbo-kit-gen2/





JNC Manifold: $4,799 top mount tubular external WGs

Price is with Precision NG 6870. They can also make a bottom mount manifold with v-band with the Precision NG 6870 for $5,200 shipped.

https://jncmanifold.com/supra-b58-6-port-gen-2-t4-divided-single-turbo-kit/

JNC Manifold: $6000 PTE6870NG. Tubular dual wastegates.

https://jncmanifold.com/products/2021-a90-a91-supra-b58-6-port-turbo-kit



Alunox? Equal length bottom mount. INTERNAL WASTEGATE.

“Well, here’s something. A twin scroll setup with OEM like response that is capable of far greater engine output. For those interested or curious, the only true equal length manifold on the market. T4 divided with stepped runners, quite the sound. Not a kit, but the manifold can be purchased from Alunox.”

Need to find link to website but here is a Supra forum post about it:

https://www.supramkv.com/threads/6-port-supra-b58-big-turbo-options.29770/post-461334



Log Style manifold / external wastegate kits:



Spool top mount: $7K but 2nd gen not next gen turbo. Log style billet manifold. Single wastegate port, might flutter? It’s compact but log style. Got feedback from some who run it with no complaints.

https://spoolperformance.com/produc...-manifold-b58-gen2-top-mount-turbocharger-kit



Big Boost: $5000

Log style bottom mount, single wastegate on top. No cat option on site.

https://bigboostturbo.com/products/b58-precision-turbo-kit



Black Market Race / JNS Fabrication: $7500?????

Releasing soon, just saw this IG post. Seems to be cast tubular, curious on sound difference between full tube and this almost log style.

https://blackmarketrace.com/


CES Motorsport: BOTTOM MOUNT, log manifold, stock location but with external gate? Need to get more info kit still in development.



Hybrid / stock location / internal wastegate kits:



4N Motorsport EFR $6400

meant for gen 1 but apparently fits gen 2. Unsure if anyone runs on Supra).

The B58 manifold shares the same overall design as our S55 kits. The manifold is a twin scroll design and we are continuing to use 321 stainless sch10 material. This is much lighter than thick wall sch40 construction. 1.25 sch10 has a larger 1.42in ID proven to flow up to 2,000HP on inline 6 applications. Our twin scroll design has better time to boost and is designed with only long radius bends that are as close to equal length as possible.

https://4nmotorsport.com/products/b58



Pure 900 stock mount: $2700-$3000???



Remnant: $3950 for drag race turbine housing. Took a while to develop kit but now it’s out and no negative feedback.

RP 65 OMEGΛ Turbo kit for the 2021+ A90 (MKV) Toyota Supra GR 3.0 (6-port) | Remnant Performance



DAW Ultra flow: $3000
https://1fastsupra.com/products/bmw-supra-b58tu-gen-2-ultra-flow





Factory Wastegate control options:



Vargas: Turbo smart Straight Gate B58 adapter: $155 for adapter only, $850 for gate and adapter.

https://vargasturbo.com/product/vtt-dcs-ewg-control-system-for-turbosmart-straight-gates/

Black Market Race:

https://blackmarketrace.com/products/b58-straight-gate-integration-kit

Walton:

Walton Motorsport x Turbosmart Straightgate - BMW Actuator



ORIGINAL POST BELOW ~~~~~~~~~~~~

As I have been collecting info, links, and debating to go with a kit or custom fab setup, I figured I’d dump portions of it on the forum so others can search or add feedback for any of the items on or not on this list.
This list only pertains to the turbo kit hardware portion, not tuning, fueling, etc.
And it’s focused on top mount commercially available kits. I was collecting these with the goal of running a tubular manifold, external wastegate, high flow catalytic converter kit, ideally with a straight gate & factory EWG, and with at least the factory downpipe or other support in place, so most of the options revolve around that, but there’s some listed here that fall outside of that realm and cross into the bottom mount / hybrid turbo world.
Many Hybrid and other stock location kits can be found here:
https://www.supramkv.com/threads/hybrid-turbo-sizes.15424/
But there are a few others mentioned at the bottom.

Feel free to add products or feedback and I’ll keep this updated over time.
Prices listed may not be 100% accurate as they depend on options selected. These should all be for a 6870 size turbo unless otherwise mentioned.

Keep in mind turbo prices were supposed to increase this week I think 30% for precision for example.

Tubular manifold / external wastegate kits:

Vargas VTT-FAB top mount tubular single straight gate factory EWG: $10,582

No cat options, no coatings, recirc single WG, factory boost / WG controller. No catch can. 6 into 1 manifold V-band, not twin scroll. Factory WG control very close to heat, need to watch to see if anyone buys and runs this kit.

https://vargasturbo.com/product/vtt-fab-b58-factory-control-ewg-top-mount-single-turbo-kit/

KLM top mount tubular external WGs: $10,232 all options

With $1K cat option, dual WG, very widely used. Included catch can in this price (450). No BOV anymore.

A90/91 Supra 6-Port Turbo Kit - KLM Race

ETS: $9298 top mount tubular external WGs with BOV 6870 Next Gen.

comparable to KLM. Seems like the most complete kit, has additional support bracing on manifold, downpipe, and dump tubes. They will weld in a cat for around $900 as an option as per sales department.

https://www.extremeturbosystems.com/products/ets-2021-a90-a91-supra-b58-6-port-next-gen-turbo-kit

Full Race: $8555 top mount tubular external WGs

Site has very good diagram of kit. Partner of Titan.

https://titanmotorsports.com/produc...pra-6-port-top-mount-twin-scroll-t4-turbo-kit

Doc Race top mount tubular turbo kit: $6200 next gen 6870.

No cat option. Silicone connections not HD clamps. Need to contact sales to see if cat is an option. This is cheapest tubular top mount option so far.

https://docrace.com/products/2021-a90-a91-6-port-supra-top-mount-turbo-kit

P2uned tubular top mount external WGs turbo kit: $7480 G35-1050 Garrett WATER COOLED turbo.

No cat option? Need to ask if they will add one. P2uned widely used on drag setups. Also offer other pro series and some other kits on site.

P2uned B58 Series 1 Turbo Kit | p2uned.com

Walton 6870: $7900? Tubular top mount single straight gate

Varies depending on options. Over in UK. Works with Osprey. They couldn’t provide me with Supra fitment details since they mostly run on BMW’s so far but this is a newish kit.
Walton offers WG vent to atmosphere is wanted, or recirculated.
Huge single wastegate port on 6-into-1 non twin scroll V band manifold. Can use factory WG controller with straight gate.

Turbo Manifold BMW B58 - Big Turbo High Mount – Walton Motorsport

Walton Top Mount Turbo kit | Osprey


Log Style manifold / external wastegate kits:

Spool top mount: $7K

but 2nd gen not next gen turbo. Log style billet manifold. Single wastegate port, might flutter? It’s compact but log style. Got feedback from some who run it with no complaints.

https://spoolperformance.com/produc...-manifold-b58-gen2-top-mount-turbocharger-kit

Big Boost: $5000

Log style bottom mount, single wastegate on top. No cat option on site.

https://bigboostturbo.com/products/b58-precision-turbo-kit


Factory Wastegate control options:

Vargas:

Turbo smart Straight Gate B58 adapter: $155 for adapter only, $850 for gate and adapter.

https://vargasturbo.com/product/vtt-dcs-ewg-control-system-for-turbosmart-straight-gates/

Black Market Race:

https://blackmarketrace.com/products/b58-straight-gate-integration-kit

Walton:

Walton Motorsport x Turbosmart Straightgate - BMW Actuator


Other options not properly categorized yet or I am lacking info on:

CES Motorsport kit:

sounds like bottom mount Xona. Unsure if it’s single, dual, or internal WG yet

JAS:

fabricator with several B58 options.
https://www.facebook.com/profile.php?id=100030956421670

4N Motorsport: $6400

bottom mount tubular for EFR internal WG.
https://4nmotorsport.com/products/b58

EOS:

bottom mount log style single external wastegate

need to get proper info on this but an older for sale thread with a lot of customized / fabbed parts found here:
https://www.supramkv.com/threads/10...illet-manifold-bottom-mount-xona-11569.19690/

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[rottmore]

I'm still stuck looking for a bottom mounted T4 manifold for a BorgWarner. Nice write up though

 

[shaloot]

I'm still stuck looking for a bottom mounted T4 manifold for a BorgWarner. Nice write up though

I think big boost is bottom mount with a single WG on top, this is a borg Warner turbo. But it’s log style, pretty sure any bottom mount will have to be log mani.

https://bigboostturbo.com/products/bigboost-b58-efr-turbo-kit

edit: nvm on WG now I see this BW uses factory WG controller

 

[razorlab]

If only there was already a thread with a listing of all the hybrid options...

 

[rottmore]

I think big boost is bottom mount with a single WG on top, this is a borg Warner turbo. But it’s log style, pretty sure any bottom mount will have to be log mani.

https://bigboostturbo.com/products/bigboost-b58-efr-turbo-kit

edit: nvm on WG now I see this BW uses factory WG controller

Yea, when it comes to bottom mounts, our options are pretty limited. Space constrains make fabricators default to top mount. I've seen the big boost & docrace kits, but im sure they were designed for a f30i chassis. The EWG bracket is something I'm adding to the kit but since I'm building the motor and trans, il be pushing +36psi. Not sure how much PSI the OEM EWG can handle before i have to go pneumatic.

 

[shaloot]

If only there was already a thread with a listing of all the hybrid options...

Fair point I’m cutting out the hybrid / stock location / internal gate options and linking that thread.
Only reason I am gathering this is I’ve no interest in those and wanted an easy comparison list of all top mount options in one spot

 

[shaloot]

Yea, when it comes to bottom mounts, our options are pretty limited. Space constrains make fabricators default to top mount. I've seen the big boost & docrace kits, but im sure they were designed for a f30i chassis. The EWG bracket is something I'm adding to the kit but since I'm building the motor and trans, il be pushing +36psi. Not sure how much PSI the OEM EWG can handle before i have to go pneumatic.

I think you’re right about them designed for the true BMWs.
as for EWG this is exactly what I’m trying to collect about the it and the straight gate. There’s limited feedback out there but have started asking tuners.
in my head I want to run this style wastegate but I’ve heard mixed feelings about the risk of heat and overpowering it. But at this point it still seems unproven for reliability.
The good thing is can still run a pneumatic gate that controls the straight gate if it goes to shit.

 

[Twisted Tuning]

It's crazy how many people look for turbo options and literally the best 1100hp turbo on the market (prior to the next gen PTE releases last year) is the Borg Warner EFR9280 turbo. No 1100hp turbo has better transient response and spool.

I'll be honest, majority if not all the manifolds are going to perform the same. Mainly because most of them are identical to very similar runner design and length. Focus on gate placement. then choose the turbo you want. Most kits use the same to similar ancillaries.

 

[ChrisIsIced]

Great compilation. Love that you include the cat options. I've pretty much settled on the p2uned kit because I want water cooling for road course sessions and v band. I asked them on ig if there's enough clearance on the downpipe to have my local shop weld in a gesi cat and they confirmed it's doable.

 

[shaloot]

It's crazy how many people look for turbo options and literally the best 1100hp turbo on the market (prior to the next gen PTE releases last year) is the Borg Warner EFR9280 turbo. No 1100hp turbo has better transient response and spool.

I'll be honest, majority if not all the manifolds are going to perform the same. Mainly because most of them are identical to very similar runner design and length. Focus on gate placement. then choose the turbo you want. Most kits use the same to similar ancillaries.

im shopping around mainly because ive got a really weird list of desires for whenever i build mine lol

1) headroom for the future, years later after building the motor.

2) external wastegate vented to atmosphere.
Call me a ricer but I refuse to do all this effort and spend all this money to only have an internally gated setup.

3) much less space constraint, thus top instead of bottom mount. Maybe this will prove to be wrong, I know CES is working on a bottom mount to add to the handful of others. Not sure if it’s internal or external WG though.

4) space for or better yet option to have high flow cat at the time they fabricate the kit. Well because it’s not a track only car and I’ve sniffed enough catless fumes over the years to be fine with the restriction. Some may say it’s silly to want a car as well as dumped wastegates, but to me it’s the best combo of sound, lessen the flow restriction when gates are open, and keeping it quieter / less smelly when driving normal.

5) I’ve been a little obsessed with the notion of using a single WG with the straight gate & factory EWG controller ever since seeing the Vargas kit. In my head it seems like an ideal setup. But dunno if it’s reasonable to actually do it with the trade-offs of needing single wastegate vs duel to do it, not knowing the limits of that EWG, etc.


So anyways just planted all this here since I had already collected the info, but while we are all here if you or anyone else have suggestions on these desires or other top, bottom, reverse cowgirl mount kits in general I’d read the shiz outta your posts lol. I had finally talked myself out of going with a cheaper log style like Spool, even though I’d prefer to keep a water cooled turbo too.
I agree most of the divided top mount manifolds are all about the same. ETS places the WG ports farther from the collector but all basically the same.

 

[Coqui]

Have my ETS 6870 arriving this week.

 

[Twisted Tuning]

It's crazy how many people look for turbo options and literally the best 1100hp turbo on the market (prior to the next gen PTE releases last year) is the Borg Warner EFR9280 turbo. No 1100hp turbo has better transient response and spool.

I'll be honest, majority if not all the manifolds are going to perform the same. Mainly because most of them are identical to very similar runner design and length. Focus on gate placement. then choose the turbo you want. Most kits use the same to similar ancillaries.

Follow-up to this post.... this is no antilag. Just normal spool of my EFR9280.

52psi @ 4600rpm

 

[shaloot]

tubular or log manifold? Mind sharing pics and deets?

Looked at the big boost kit for the efr, their description says mani has an external WG port. But the turbo very clearly shows a factory EWG attached and arm to the internal gate.
Yet I find another pic of that turbo on some other sites and I see a normal turbine exit, not internal gate. Guessing big boost’s pics or description is for a different kit / turbo.

The efr does look to be a good match for B58 overall.

but I’m more concerned with the details on the whole package quality, fitment, completeness. Without needing to hammer cut and rig stuff to fit or go make new lines & hoses, would like to bolt something on, keep torque spike fairly low, and not touch anything for years until building the motor then perhaps a larger turbo.

Follow-up to this post.... this is no antilag. Just normal spool of my EFR9280.

52psi @ 4600rpm

 

[razorlab]

52psi @ 4600rpm

 

[McBobby Jr]

I'm still stuck looking for a bottom mounted T4 manifold for a BorgWarner. Nice write up though

4N Motorsport kit will do, T4 w/ EFR seletction. Just ask for a gen 2 flange.

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