Toyota Supra MKV 3.0L GRAIL Exhaust + GRAIL Downpipe (with thermal insulation), Armaspeed carbon cold air intake and T51R mod.

[Atlas]

Hello fellow European Supra MKV owners and forum users,

This is my first post here, and as you might have guessed from the title, I would like to make some sound modifications to my Supra in order to make my European Supra sound the way a Supra should. I am currently not interested in power tuning, as I don’t want to tamper with a car that is quite new (2025).

As we all know, regulations in the EU are much stricter than in the US, so I have a few concerns about the modifications I want to address here before ordering them.

From what I read on the GRAIL website, the exhaust and downpipe should be EU road legal, as they are ECE (OPF | Euro 6d‑TEMP) certified (https://grailautomotive.de/Toyota-GR-Supra-30l-MK5-Grail-Exhaust_1). But just to be sure, I would like to ask if anyone can confirm their road legality.

My main concern is the Armaspeed carbon cold air intake (https://www.armaspeed.com/product/toyota-supra-a90-mk5-3-0-carbon-fiber-cold-air-intake/) and the T51R mod (https://daddyturbos.com/products/t51r-mod-d?variant=53486592590115). There is almost no information on the internet regarding their legality in the EU. Has anyone installed them in Europe? Are they road legal? What are the main concerns?

Also, will these modifications cause problems with the manufacturer in terms of warranty or other issues? From what I understand, European Court law has a solid stance that under EU consumer warranty law, a manufacturer cannot cancel the entire warranty just because aftermarket parts have been installed. The dealer must prove that the modification caused the problem before denying coverage.

For reference, I live in Estonia.

Many thanks and best wishes to everyone!

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[SJ-Ray]

Hi,

regarding the intake, you might want to check out E-Intake.
They have one for the Supra with a german "Teilegutachten" where they state the intake is legal with Downpipes + Exhausts which meet the ECE regulations.
But i don't know how much worth the Teilegutachten has in Estonia.

I myself already got the intakte from E-Intake and in the future i'm gonna purchase a HJS Downpipe + an Aulitzky Tuning Exhaust (both are ECE approved).

Why the HJS Downpipe? It has a 300 CPI cat which should not trigger a CEL light.
200 CPI Cats are prone to trigger CEL and Grail doesn't state how much CPI their downpipe has.

 

[w3stside]

Maybe not what you want to hear but I said fuck it after trying to go your route and went all in tune+ AAA DP + OPF-free exhaust. I don't drive mine daily tho and keep my speed & RPMs low around police/downtown areas

Concerning work done at Toyota ie warranty I don't have experience there yet but as you say it's gray area so expect a fight from every dealership as they would make more money from you out of warranty.

If you're decent with a wrench, all of these parts can be self installed. for example I'm ass at car maintenance but self installed my lowering springs, intake, DP and exhaust in my apartment garage space. So for warranty work you could just swap back the OEM DP tho it's not a 5 min thing tbh. Intake also probably needs a couple hours (just the aftermarket reinstall, OEM is easy).

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