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The higher the octane, the more aggressive the map can be. OP asks which map to run when the essential factor in getting an accurate answer is octane which he does not mention. Map 1 works fine for either octane. You can run map 2 with 93 with no problem, but if you are running 91 and want to...

It depends on the octane you use

You can run without a tune; the Check engine light is triggered from the downpipe but it's only a warning light.

No sound clip is available yet. I will flow similarly to other catted downpipe options on the market. The advantage of getting MST over other brands is that it does not trigger the check engine light.

anyone can run it

Per MST, the cat comes with a 2-year warranty, if you get a CEL during that time, they will replace the downpipe for free. https://x-ph.com/mst-performance-6-catted-downpipe-for-bmw-toyota-b58-3-0t-supra-m240-m340-m440-340-440-540/

FITMENT REVISED This is one of the highest-efficiency downpipes worldwide. Suitable for BMW/Toyota B58 3.0 engine vehicles. Bringing even more performance & exciting exhaust sounds to your vehicle. Features * Largest diameter downpipe for B58 worldwide * 6" diameter Euro 6 400 cell...

I have not seen any data showing real gains yet. Maybe with crazy builds and upgraded turbo, but so far, nothing to show improvement on the stock turbo as far as I know.

I'd go with AWE + the catted downpipe. In my opinion, the AWE exhaust sounds better.

LOL

its a very popular product for our customers. We sold over 80 kits

Congrats!!

We offer over 50 000 parts; we can ship to you and do not charge for shipping in the US on most items.

:thumbsup:

We offer both brands, The CTS intake is more popular.

bump

bump

got your dm, let's see if we can make a deal :)

Thank you!

Im glad to hear that :D