Hi guys i have a set of side pipesthay i would love to put on my sx4 using a Y pipe to split it they look great on the car in the mock up phase but before i destroy how much power if any will i lose having a lack of back pressure the car is already a bit of a dog for the 258 motor and i dont wanna make it worse for a cosmetic upgrade. but it dose look great haha my thought is no cat no muffler just the baffeled side pipes and a Y pipe to split any suggestions.
thanks
mike