Hello all. I've had my FC for about 1.5 years at this point and have had an exhaust leak from the header to cat since the day I bought it. I recently decided I couldn't live with it anymore (because my 5/6 ports refuse to work because of loss of back pressure), so I bought the RB presilencer with the pickup tube. I will be deleting the stock cat. Car already had a header, unknown brand. I don't think it's RB. From the cat back, I installed an HKS Hi power.

After attempting to install the presilencer, I ran across an issue with fitment. It seems the presilencer is longer than the stock cat by about 6 inches. I believe it is because of the length of my header, but not sure.

Before going ***** deep and buying a header from RB, I wanted to ask on here to see if anyone else has some insight
Does anyone know if an RB header, presilencer, and HKS cat back will jive with each other?

 

yes that will work. RB's setup made sense in 1987, but its kind of a PITA now....

 

Gotcha. I just wanted to verify before dropping another 300 or so on an RB header, just for the presilencer to not fit between the header flange and the cat back. The RB presilencer says it's designed to bolt up the the stock Y pipe. I think the flange for the Y pipe sits further back towards the rear of the car than the HKS does. Does that make a difference?

Appreciate the input

 

Another question I had is this:

RB makes a header that has a vaccum reference for the 5/6 ports already. I would honestly prefer this option over the presilencer, because I like my cars loud. That being said, does anyone know of a test pipe that will go from the header to the cat back, that will delete the factory cat? Or will this have to be taken to an exhaust shop?