im currently running a b16a2 w/ bolt ons. I was thinking about getting either 2.5 inch pipiing or 3 inch piping for it. Although im afraid if i get caught without a catalyc convertor. i heard the fines can hit 3,000 dollars, not worth it at all. I was htinking maybe getting the pipiing and then a hi flow cat. i currently have an apexi n1 cat back, am i going to have to get rid of the apexi and buy a muffler to stick on the tip or is there a way i can keep the apexi with getting maximum gains? Also this straight pipe will give me high end speed right? thanks

 

bump

 

anybody?

 

2.5

 

definitly not 3

 

how will it sound ricey with the 2.5 piping? what is the stock piping on my si? will i need to buy a muffler to weld onto the straight pipe? im currently running a apexi n1 cat back, is the piping from the cat to the muffer on that exhaust system 2.5 or is it stock size? thanks alot

 

bump

 

dude do 2.5 or itll suck ***, unless you got a turbo or s/c. then go 3

 

how will it sound ricey with the 2.5 piping? what is the stock piping on my si? will i need to buy a muffler to weld onto the straight pipe? im currently running a apexi n1 cat back, is the piping from the cat to the muffer on that exhaust system 2.5 or is it stock size? thanks alot

also wat is a s/c?

 

dude, im running some shitty *** header, into a pacesetter hi-flow cat, and then my 2.5" magnaflow cat back on my b16a. it sounds real deep and not ratty. if you go with a straight pipe itll sound like a shitty ratty car.

thats just what i have. your car, you run what you want. im just sayin if you run straight pipe itll sound like a damn cavalier with a "cool" apc muffler

 

your stock pipe is probably somewhere between 1.5 and 2" cast iron.

2.5" SS would be just great for you.

s/c = supercharger

 

what would be a good high flow cat that you perfer? thanks

 

magnaflow makes a good 2.5" in/out high flow

the part number is 94006

 

get 2 1/4 or 2.5. if you go to 3 you'll get backpressure and it'll sound like $h!t. but if you go force induction get the 3

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mountaindewguy &raquo;</TD></TR><TR><TD CLASS="quote">get 2 1/4 or 2.5. if you go to 3 you'll get backpressure and it'll sound like $h!t. </TD></TR></TABLE>

He'll get backpressure if he gets 3" piping?!? He'll have less back pressure with a larger pipe, it'll still be there, just less.

Anyways...for a B16A2 that is only mildy modded with bolt ons, 2.5" ID piping will be more than sufficient. 2.5" piping will support almost 300whp, which you won't be close to.

 

Random Technology makes good high flow cats.