STAGE 1 - 264/264:
Street use and more aggressive turbo and nitrous. Slight lope at idle. RPM Range: Idle to 7500+

STAGE 2 - 264/272:
Specs derived from the popular 264 Intake/272 Exhuast combination. RPM Range:
Idle to 7750.
Note: Upgraded Valve Springs recommended.

STAGE 2 - 272/272
Most popular profile for street/strip. Excellent all purpose turbo. RPM Range: 1000 to 8000.
Note: Upgraded Valve Springs recommended.

STAGE 3 - 280/280:
Recommended for strip and some street. Lope at idle. RPM Range: 1100 to 8250+ Note: Upgraded Valve Springs required!

STAGE 4 - 288/288:
Top end insanity. Not for the inexperienced tuner. Race only! RPM Range: 1200 to 8500+
Note: Upgraded Valve Springs required!