got my hands on a DC sport 4-2-1 free (not stolen), and i was wondering if fits on the b18b in my LS before i get in there and try it.

 

No, it's too short.

 

are you sure? i got mixed responses (too mixed) the last time i asked on hmt, but a few people said that it's the 4-1 that won't fit, but the 4-2-1 will clear.

 

Well it's not long enough to bolt to your cat anyways, not to mention the LS block is taller than the B16. You could try it if you want.

 

What does the 4-1 and the 4-2-1 stand for?

 

4-1 is 4 pipes at the start of the manifold and they join at the end. 4-2-1 is the same but they join into 2 half way down then into one at the end.

 

Ahh, cool. Thanks! So only 4-1 fits Integra LS's?

 

no, i have heard the B16 4-2-1 header may fit, the LS block has a taller deck.

 

no it will not fit. you will need to extend it and weld. the LS header is longer. even the GSR headers wont even fit the LS. U could fit it but youll have to extend it and cut and weld. I had B16 headers and it wouldnt fit. My dad's a welder so we extend it and now it fits. But i sold that header and got me another one.

 

the b16 header is too short for the LS. i tried one upon a time. it is about 2-3 inchecs too short. it will not clear the oil pan. you can cut the header and make it a little taller, other than that, wont fit.