4 into 1 or 4-2-1??

[Supercharged Nat]

ok so i hear good things about both, but which is the one to have? ive alreadly got a 4-2-1 large bore manifold but im looking into making my own stainless one, more compact and more suited to my application. i need to know should i go for a 4-2-1 again or do i go for a 4-1 i think the 4-1 could be made very simply and and take up alot less room than the 4-2-1.

 

why do manufacturers make them so long? surely 4 short pipes bending into a collector and then one pipe under the car would be ok?

 

what i dont want to do is make up this new manifold and loose power/ torque because of its design. i understand by going from a 4-2-1 to a 4-1 will move the torque about a bit but will it loose power?

 

will i notice the torque shift?

 

any help greatfully received!

[SAF_Capri]

doesnt a 4-2-1 make more torque? and the length of the pipes is designed for best flow? ...im no exhuast specialist tho!

[5hane]

doesnt a 4-2-1 make more torque? and the length of the pipes is designed for best flow? ...im no exhuast specialist tho!

 

sure 4-2-1 is more torque and 4-1 is bhp

[Vista]

4-2-1 is better for road use with 4-1 giving more power at the top of the rev range and therefore better suited to track use when the engine is up there most of the time.

[LEONMEX]

As vista said 4-2-1 is better for the road,put a ashley system on mine & it works a treat