I'm looking to pick up a J's or Top Secret rear diffuser, and the only thing holding me back is not knowing how much modifying needs to be done for this set up.

I've had people tell me it was necessary to cut out a whole piece... then there was some who say only brackets need to be cut--

Could anyone with an HKS dual exhaust and either of the two rear diffusers please enlighten me as to the specific modifications required???

Thanks.

 

you don't have to cut out a whole piece, what you have to do is cut and trim on the bottom of the diffuser