So Im planning out my parts list for the exhaust system and thinking I want to go with a nice quiet exhaust. The engine it trails will be an N/A b20vtec and of course I need all the extra air flow I can get as I would like to put down the best numbers I can.

I like the Apexi WS2 but its only 60mm which is 2.36 inches. You guys think its too small? Should I just fab up a 3" exhaust and buy a good name brand muffler?

 

well I know a lot of turbobacks are 3". I honestly dont think that you should go 3". I think if you're going N/A you could go with a 2.5" Thats just my thoughts, could be wrong

 

ya im wondering if a 3" could hurt my performance, Iv heard of that happening

 

possibly if you lose backpressure

 

you'll be good with the WS2. 3" is for like if your running turbo or something.

 

Agreed. The magnaflow for my car is about 2.25..

 

for N/A run 2.25 or 2.5. 3 inch on a honda only does any good if you have a turbo or supercharger

 

Tony (Forty04) said his Megan Drift Spec worked will for both N/A and F/I

 

https://www.hondacivicforum.com/m_39893/tm.htm

btw, everywhere that I've read recomends 2.25" piping onany N/A 4cylinder

 

think of it as a total power number...a b20 vtec won't make anything over 200 without some work (someone correct me if I'm wrong) and even if it does, it won't be by much, you should be fine with your 2.36 piping.