Ve headers will these work

[joely116]

I'm thinking of buy these 1 3/4 4 into 1 3 inch primary will these be able to fit up to a cat back 2.5 system, would I use 3 inch cats aswell or 2.5, I'm getting them installed but I'm buying the parts first,

 

[AD07]

The flange plate bolt holes (end of cat to cat-back) should match up. I would go 3" cats to match the headers.

 

[Not_An_Abba_Fan]

When buying headers and cats for the VE, get them as a matched set, as different brand headers and cats will not fit together. They will all bolt to the cat back though.