I just made a JDM d15b swap and it comes with a kind of 4 to 2 manifold/exaust like headers. I belive is the same as an 96 and up EX one. Will this one flow better than the original d1.5b7 civic DX one or should I go for the JDM one?

1.5DX manifold/1.5DX exaust?

JDM 1.5 Vtec manifold/JDM 1.5 Vtec exaust?

1.5DX manifold/JDM 1.5 Vtec exaust?

JDM 1.5 Vtec manifold/1.5DX exaust?

Thanks

 

Bump for me!!! Does anybody noticed any power gains with those?

 

A stock exhaust off a higher output engine is going to flow better. Measure the inside diameters of both collectors and you'll see. The downpipe from the D16Y8 flows better than the one from the D16Z6.

http://www.hadamotorsport.com/tech/review/dsemc/

 

Thanks. The one I have is from a JDM d15b Vtec. Does anybody knows if it is simillar to the Z6 or Y8?