When looked at in terms of pre 1971 gross HP numbers stock D port non RA type exh Manifolds have been proven to allow some 360 hp on a 9.5 to 1 400 motor, if your looking for HP numbers above that then it's atleast time for RA type Exh Manifolds or headers!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
Last edited by steve25; 11-11-2019 at 10:45 AM.
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