donut

[daytona90]

what size donut should i use to mount my 2.5 downpipe to my 2.25swingvalve. Thanks

[thefitisgay]

2.5s fit into 2.25 might have to fight with the holes... aka oval them out on the plate on the down pipe on the insides of the holes so the bolts line up

[iangoround]

What he said. The 2.5" donut will fit in, but the flange is a different size. Oval out the holes on the downpipe and don't forget to use a washer or something.

Or you can buy my extra 2.5" swingvalve if you're running a garret turbo and feel like pulling the turbo off to swap it out.

[daytona90]

thanks guys.