Correct Replica Racer 43
Even on a 'basic' 318/200 HP, you will gain something with
a set of long-tube Headers.
On the 'Chassis Dyno' we usually saw an increase of
{10 to 12} Horsepower @ 3000 RPM's on the Mopar 318
with it's 'fire-breathing' BBD 2-Barrel.
And with a nice improvement in Low-End Torque as well.
With the small primary tubes, we could gain approximately
25 Ft/Lbs. of Torque @ 3000 RPM's.