k24a3 k swap 2.5" or 3" exhaust..

**Samm928** · 24-07-2010 06:16 PM

headers are 2.5" flange.

should i just run with 2.5" the whole way?
or go 3" from headers back.?

would i be losing massive if running 2.5"? :S

**munkaii** · 24-07-2010 06:40 PM

With the amount of power you'll be dealing with (considering future upgrades), 3" would be a better choice. 2.5" might be a bit restrictive. Most B series conversions would probably utilise 2.5".

**jimmeh** · 24-07-2010 07:02 PM

ive got a K20 in my civic and i have to recommend 3" so will any shop that u speak to.

**EG5** · 24-07-2010 07:46 PM

3 inch for sure

**xntrik** · 24-07-2010 08:45 PM

3 Inch.

**Samm928** · 24-07-2010 09:04 PM

ok ok.. thanks..

**kwokstaa** · 24-07-2010 11:03 PM

has anyone even tried 2.5 inch or is that just the general go of what people say on the forums about k engines.. lol

**EG5** · 25-07-2010 12:23 AM

Originally Posted by kwokstaa

has anyone even tried 2.5 inch or is that just the general go of what people say on the forums about k engines.. lol

We did tried 2.5 inch exhaust back in late 2004 on our k20a EG , 3 inch is the way on K20a , K24a

**DR HONDA** · 25-07-2010 07:44 AM

Originally Posted by kwokstaa

has anyone even tried 2.5 inch or is that just the general go of what people say on the forums about k engines.. lol

3 inch 100%. I have tried 2.5 inch early days and the difference was noticeable changing over to a 3 inch in every way, good luck

**fatboyz39** · 25-07-2010 12:22 PM

2.5 if its daily driver. 3' for all out power/race.

**DR HONDA** · 25-07-2010 08:31 PM

Originally Posted by fatboyz39

2.5 if its daily driver. 3' for all out power/race.

what drugs are you smoking boy? 2.5 inch if you like breathing through a straw. if you are going to do a k swap and try to save $100 from a 2.5 inch to a 3 inch and its going to bust your budget then do it