what pipes to use on a twin?

[UGOT8]

Needing help on what pipes to use on CMB 91 HR'S I see some guys running

the new AB 67 pipes and some guys running the new 91 hundred pipes, and I

was wondering how you get the 91 headers to fit the AB 67 pipes? What is

the difference in the performance in the two pipes? any help will be appreciated in

what way to go. thank you,

Tony

 

[Scott Norris]

Tony, I run a 1.01 with the AB 67 pipe set at 12" in a big heavy Standard Roadrunner single. It Hauls Hiney down the Straights. I didn't know a 1.01 could turn that many R's. of course it loses some speed in the corners because it weighs about as much as a cinder block. As far as mating the pipe up I just ordered some "7/8 Reinforced Silicone Tubing from McMaster Carr and it fits pretty well to both the header and the pipe. Holds up good to the heat also. Part number at McMaster is 51735K31.