hey i need some advice on what i should do. I have a honda civic 99 si usdm which used to have a b16a2 drag turbo kit on it, but I decided to go all motor and did a b18c ITR swap. Thing is i kept the Thermal RD 3 inch cat back exhaust system and got it welded to my cat and used the ITR headers 4-2-1. Should I get a 2'5 inch exhasut? The reason I ask is am I losing power buying keeping the 3inch? Any help would be great

 

too much flow, so little power 2.5 is good

 

No back pressure , definetely go with 2.5...

 

thanks for responding back. so 3 inch pipping will only benefit me ever if my car is running boost?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Vtech_247 &raquo;</TD></TR><TR><TD CLASS="quote">thanks for responding back. so 3 inch pipping will only benefit me ever if my car is running boost?</TD></TR></TABLE>

Thats Correct

 

2.5

 

you're not loosing power you're loosing torque with the 3 inch. get a 2.5 or a 2.25 (if it's a stock engine)