MT Supra overboosting/throttle closure with catless dp

[jtsang25]

Wouldn't an option be a catted downpipe? There are gains to be had with that, correct?

Minimal without a tune and not all after market cats guarantee no CEL.

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[Tacoma714]

Wouldn't an option be a catted downpipe? There are gains to be had with that, correct?

Gains when modifying come from tuning the ECU and DME. In your, and my case, Femto partial unlock is the easiest option. Don't go and buy intake, downpipe, etc because you won't gain anything aside from more noises.

 

[noogie]

Any gains are by “accident” without a tune and potentially unsafe. You’re changing engine airflow without knowing what the engine is actually doing. If you want controlled gains, you need a tune.

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