Tommytooth

I have an evo 8 with an after market greddy exhaust and I wanted to get a Megan racing test pipe. Will it cause my car to have worse performance even if there's no check engine light or will I need a new tune because it already had one

gsrboi80

iTrader: (38)

A straight through exhaust will allow for more power to be made on any turbo car.

RussellDaniel

iTrader: (9)

No it will definitely open up some power restricted by the cat. You will need a tune after install. Some will argue that you don't im sure but you will and should.

golgo13

iTrader: (134)

What these guys said.

mdsevo06

iTrader: (41)

You'll need a sparkplug non-fouler, or just turn it off when you tune.

RussellDaniel

iTrader: (9)

I've heard even with the non fouler some people still have problems.

Tommytooth

I already have a tune will I need another one after the install? And will it make a significant difference if I don't get it

VR4Babe13

iTrader: (1)

You're tuned based on the parameters your car was putting out with a CAT, now that you will be able to push more air you're changing those parameters, so a new tune could definitely help.

RussellDaniel

iTrader: (9)

Yes most definitely anytime you change your set up your gonna need to get your tune at least tweaked. Depends on the gravity of the modification.

04AWDTURBOEVO

iTrader: (26)

With a test pipe and then a tune, gains of 20 whp no problem .