On a boosted [obviously] car what is best size for piping on exhaust? 3" I'm seeing everywhere? Would it be BAD to take a spoon n1 exhaust, cut everything down to muffler alone and put a custon 3" pipe on it? Would that make me lose too much power? I just love how it's not huge and shiny and stuff..

first post in fi and huge nub slice wanting to learn as much as possible so please be gentle when I ask other stupid questions..

 

if you have a lower-displacement honda engine (b16, b18) then you can do a 2.5" and still see good power, unless you boost more that 10 psi or so....

if you have a higher-displacement one (h22, H23, b20) then it is suggested that you go with a 3" reguardless...

 

Well daily I plan on boosting like 7 but more than a couple days of the month I wanna run ~15psi.. should I get 3"?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsxtek &raquo;</TD></TR><TR><TD CLASS="quote">Well daily I plan on boosting like 7 but more than a couple days of the month I wanna run ~15psi.. should I get 3"?</TD></TR></TABLE>

yup...cant go wrong with 3 inch

 

I have a 3inch Thermal and I SIMPLY love it, one of the best mods I have done... I was boosting 9psi and it made a huge difference and now I boosting 1 bar... Get a 3inch and get it donewith you won't be dissappointed IMO