Tru bendz turboback exhaust

1149 Views 2 Replies 3 Participants Last post by WillL84, Feb 20, 2020

Cayleb19

Discussion Starter · Feb 19, 2020

Hey everyone. I’ve got a 1.4t cruze with a ZZP catless downpipe, and muffler delete. I’m interested in getting a 2.5” downpipe back exhaust, but worried how it will run. Will it run correctly without a tune? Thanks.

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PolarisX

· #2 · Feb 19, 2020

The exhaust isn't the real concern, running a different downpipe without a tune is pointless though. Yeah it might spool half a second quicker, but it still hits the same torque target and pulls boost out. Even worse it might just be messing with your fuel trims a bit and actually making the ECU compensate.

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WillL84

· #3 · Feb 20, 2020

PolarisX said:
The exhaust isn't the real concern, running a different downpipe without a tune is pointless though. Yeah it might spool half a second quicker, but it still hits the same torque target and pulls boost out. Even worse it might just be messing with your fuel trims a bit and actually making the ECU compensate.

This. If you're going cat-back a tune isn't needed. If you've got the downpipe and are going downpipe-back a tune is a must

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