Twin 2.5Inch System Or 3.5Inch System?

[SPOOLAX]

Hey guys

Looking to upgrade my exhaust system to a Xforce 4inch Bell Mouth Style Dump-pipe with no cat into a Twin 2.5inch System Or 3.5inch System but not sure whats better?

Thanks

Edited 27/04/11 09:14 AM by SPOOLAX

[arronm]

on paper the twin 2.5 flows more but due to the extra drag on the tube walls the 3.5 maybe better.

[Panda Eyes]

3.5 sounds better, but im happy with twin 2.5 for 360+

[KWIK F6]

Hey mate I was speaking to Bruce about this the other week, he recommended 3.5" would be better...that's what im going for....Cant fault his advice so ill be following it

[xpl0sive]

3.5 xforce has a restrictive rear muffler I believe (less than 2.5"). Better off going for the twin 2.5.

[bradles024]

X-Force 4" Dump pipe isn't 4" the whole way either.

[SPOOLAX]

Hmmm who has either systems on there car?

[CBXRT]

Mate, this a touchy question - lots of different opinions.

My opinion? Single 3.5 inch should flow better so its the choice for higher performance potential. Twin though sounds better and less hollow 'mooo-cow' than a single.

It really depends on what you want from your exhaust system mate, and "one persons junk is another persons gold".

Edited 28/04/11 02:53 AM by CBXRT

[SPOOLAX]

I'm more leaning towards the 3.5 because I see that alot of 400+ cars are using them but do they have restrictive muffler like epl0sive said?

[bossmang]

you arnt having a cat, so you got no restiction there, and get the rear muffler changed to a better flowing one if its bothering you. pretty sure xforce offer two types of muffler systems for the 4/3.5 inch.