4-into-1 or 4-2-1? ex mani.

[bombz4]

basically which is better for an exhaust manifold a 421 or 4 into 1? and any ideas if a 4 into 1 is gonna be far more expensive?

 

[Alienfish360]

IIRC 4-1 manifolds generate much more torque but higher in the rev range generally suited for motorsport, 4-2-1 produce less torque but are more suited for road use. I believe it's a smaller gain but over more of the rev range

 

[bombz4]

cheers fella!:glance: asked a few places for quotes on 4-2-1s today

 

[Yom]

EDIT: Stupid me didnt see that this was the K10 section. Move along lol

 

[Slim]

and from my experience, they make ###### all diference. do you have a MA10 or MA12?

 

[bombz4]

ma12

 

[pietro]

what bhp gains from a 4-2-1 manifold on standerd exhaust and what would it cost to have made?

thanks

 

[bombz4]

I havent done it to a car before so I cant really say, im sure a few people can though. But its not going to be much, as far as i know the manifolds restrict the engine and i think i read in another post the inlet is the big restriction compared to the exhaust. I'm not even sure if you will feel the difference in preformance on a standard car although it will improve the gain on other mods quite dramatically.