I would just like to know the differences between the two. What sets them apart from each other? Ive never really looked into before so just curious. And what would you recommend for a B16A in a 88 Crx Si. And will a DC sports header fit, I heard they fit low, so will I have enough clearance?

 

4-2-1 design is said to give you more low to midrange power while the 4-1 will give you more top end. The 4-1 will yeild the overall highest increase in power. I have heard that the 4-1 hangs lower than the 4-2-1 as well.

 

So should I aim for a 4-1. What would everyone else do. Will a 4-2-1 fit properly though?

 

yea I have a 4-2-1 on my 90 CRX (DX) & i definitely felt more torque on the low end but i dont know about high end, seems a little bit better.

 

4-2-1 if you want more low end torgue,4-1 if you want more top end and bigger horse power gain