4-2-1 or 4-1

[JM_16v]

what do you have and why did you choose that one? adv and dis?

i knwo the science but what they like to drive

[jano106rallye]

actually if it's not turbocharged than don't go for any of those 2-1 is the best choice than as the manifold of peugeot is very good one. so replace it only with a bigger one if turbocharged..

[JM_16v]

been offered a janspeed 4-1 at a good price

[Nick]

i'm suprised there is a difference to be honest..

[JM_16v]

in the manifolds or standard

[peugeot/citroen mutant]

whats a 2-1?

[cas]

4 into 2 into 1....4 - 1 if you are going to replace the current. gives a better flow, on my mi16 I have a sandy brown custom 4 - 1 :) x

[Smiff]

actually if it's not turbocharged than don't go for any of those 2-1 is the best choice than as the manifold of peugeot is very good one. so replace it only with a bigger one if turbocharged..

I was under the impression the standard peugeot manifold was quite restricting, hence why a lot of guys on here have 4-2-1s or 4-1s?

2-1? But then would it not only attach to half of the engine?!

[jano106rallye]

guys i ment 4-2-1 but with the standart 4 and a wider 2 geting in to a freeflow racecat to a freeflow midle box to freeflow backbox

[james106]

isent a 4-1 ment to geive you better top end than a 4-2-1

[andyrallye]

depends on the engine. Sandy Brown can explain much better than I can.

I do know however that my Raceland 4-2-1 makes a hell of a lot of difference to my rallye. The drivability is so much better, pulls from lower down the revs. and leaves a big grin behind!!:D

[aidy]

andy, the 8v manifolds are a lot lot more restrictive tho

[JM_16v]

yeah 4-2-1 gives more low down torque, i dont wanna loose any low down torque

[Ferg]

Anything will be better than the standard manifold tbh.

I've gone with a Raceland 4-2-1 and had absolutely no complaints thus far...