[wtcobra]

The Blue Thunder is an improved version of the P.I.. The P.I. is an aluminum version of the iron Cobra Jet intake. The Sidewinder is not a high rpm manifold, good to about 6200, but does have good mid range response. If you have to buy the intake, get the B.T., hands down the best and better than the Performer RPM, Sidewinder, or the P.I. , even assuming they will fit your heads. The Sidewinder was made for the MR heads but many have been modified to fit the Low Riser and/or the Cobra Jet heads. The P.I. was for L.R. and C.J. type heads, not M.R. heads. The B.T. is available for M.R. heads.

wt