SuperStreet Extractor Wrong Combination??

[satria_neo]

I saw on their website that they join 1-2 and 3-4 together. But in a proper 4-2-1 it should be 1-4 and 2-3..... whats going on here? Is there a mistake or something?

 

[crazykatak]

There is no definite "proper 4-2-1" unless you design it your self to suit your engine specs.
Go and research more on exhaust manifolds, why is it 1-2, 3-4.

 

[^pomen_GTR^]

that joining combination depens on engine firing order...not all 4cylinder car have same firing order.....


so maybe u can specify to them so they aware of that

 

[satria_neo]

There is no definite "proper 4-2-1" unless you design it your self to suit your engine specs.
Go and research more on exhaust manifolds, why is it 1-2, 3-4.

Bill Sherwood's Engine Page - Exhaust

This is what I got. Thats why I am wondering.

 

[neohadri]

i thought all flat plane crankshaft 4 pots engine use 1-4, 2-3 extractor? i wonder why superstreet exhaust designer did that