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I keep trying to convince myself on Shorty headers , but like you , Street car 5400-5600 RPMs
If we all knew the HP difference on every particular engine , it would sure simplify things
CHRYSLER Fel-Pro MS90425 Fel-Pro Exhaust Manifold Gaskets | Summit Racing
Protects the valve cover gasket itself and valve cover paint from the extreme heat on the HP Manifolds
WI Snowmobiling
Speed = How fast you can get to the bars while staying on the trails
Torque = How many trees you take out once you leave the trails after the bars
Built my motor back a few years ago
Numbers 383 / Now a 440 source 432 Stroker
E Street Heads 75cc
Comp Cams XE275 HL
Original Factory HP Manifolds
Edelbrock 800 AVS2
10.5 Compression - 200#s cold cranking compression on all eight cylinders
Street car with 3:91 Sure Grip / Auto Trans -...
Reading this article
HP Exhaust Manifolds are not even in the same zip code
Click on Show All for higher RPMs
https://www.hotrod.com/articles/mopp-0106-manifolds-vs-headers/