I was looking at getting an omex Rev limiter for my st150, I’ve took the cat off the centre pipe but still have a cat back milltek exhaust and I think it has a cat on the manifold, would it be wise to get a 4/1 manifold before getting a Rev limiter or would it still not work with the cat back exhaust?? Thanks

don't know enough about them but can't imagine has any effect on what parts you have or not on the car, just limits revs and can do launch control etc. The car only has one Cat. The manifold has a flexi pipe obviously to reduce flexing and cracking.