'The 383' ~ Getting Those True Factory Horsepower Ratings

Abodybomber said

Sounds honest,through manifolds.., you tell me ....(Hello..)

Click to expand...

Yes, thru the Stock Exhaust System >

Mopar did claim that you could squeeze out an additional {+6 HP} if you bumped
up timing from 35* to 40* Total Advance.

As for Headers >

Mopar numbers showed a Gain of {+21 HP} over the 'stock' B-Body Exhaust System with a set of 'Hedman' H-DP2 Headers.

And in the {A-Body} with the restricted 'stock' Exhaust System, a set of
Headers unleashed an additional {+26 HP}.