guys i need to upgrade my manifold! going mad here!
have a custom made straight through exhaust
2.5 inches the whole way from manifold to back box wich is a performance mx3 back box which has a 2.5 inch bore but im not fitting it till i get a manifold cos the system will only give me 8-12 bhp gain but with a 4,2,1 manifold
that should give me about 25-30 break on top of the 8-12 for the back setup.
problem is nowhere can i find one for the 1.5 jap model.
i would take it off whatever has the same one! weather it be the V6 or the mx5 jsut need one new or second hand i dont care i have the gear to lazer clean the manifold anyway!
Get the guys who made your exhaust to make you one up.
You can't buy em off the shelf as far as I know.
i dont have the skill with a welder to make one! me and a m8 did the piping!
Have you got a stock naturally aspirated 1.5?
If so I don't see you getting a 25 bhp gain from it.
Probably best to spend your money elsewhere, but it would sound much better. :D
Breathing mods work best with other mods that increase fuelling, like CAMS etc, helping you get the most out of them.