bjmayo523
New Member
I just got a 4-1 header for my 99 GS-R. Megan racing with the 2.5" outlet. My problem is trying to find a cat to fit the system. I have looked online everywhere for the 2.5" inlet and a 60mm outlet. Please help. I want to get this put on my car asap. I have had it sitting on my living room floor for more than 2 months, so you can feel my pain.