I had to junk the stock exhaust because it was pretty worn out. Rust holes everywhere, one of the mufflers lost its hanger and just flopped around, y-pipe wasnt really connected to the cats, precats had been rodded out, exhaust manifold looked like someone used a blowtorch to cut it off, etc. So I bought a Pacesetter header, and a RP cat-back. Now I want to know how long the RB presilencer is and if that alone will be able to open my 6ports (they dont work right now, I was going to do the airpump mod but I wont if the presilencer will open them).

Just cruious, does anyone know how restrictive the RB presilencer is vs a cat?

 

They are 20".
Yes, there is a tube to open your 5th and 6th ports.
They are straight through.