Centrifugal Supercharger
The bolt-on
ATI Procharger's Street Rod blow-through kit, using a C-2 compressor running 8 psi boost. $3,296
The mule
355 small-block, 8.2:1 compression, Pro Topline heads, and a Carb Shop 650-cfm blow-through carb.
Our take
This compact setup with a relatively small compressor produces impressive power gains.
Before
Max torque: 410 lb-ft @ 4,300 rpmMax power: 390 hp @ 5,400 rpmAverage torque: 305 lb-ftAverage power: 247 hp
After
Max torque: 507 lb-ft @ 4,200 rpmMax power: 506 hp @ 5,800 rpmAverage torque: 478 lb-ftAverage power: 381 hp
Difference
+97 lb-ft+116 hp
Headers
The bolt-on
Stainless Works 2-inch primary long-tube header kit with converters. $1,941
The mule
A bone-stock, LS7-powered '06 Z06. Power measured at the rear wheels.
Our take
Even modern, high-performance exhaust manifolds can be improved upon.
Before
Max torque: 430 lb-ft @ 4,950 rpmMax power: 473 hp @ 6,450 rpmAverage torque: 404 lb-ftAverage power: 383 hp
After
Max torque: 438 lb-ft @ 4,900 rpmMax power: 481 hp @ 6,500 rpmAverage torque: 417 lb-ftAverage power: 391 hp
Difference
+8 lb-ft+8 hp