SSCoulter

iTrader: (4)

Friend of mine just bought some "stage I" heads on ebay. I am wondering how they stack up to stock heads. Here are the specs:

BOLT ON POWER, PORTED AND POLISHED LS-1 OR LS-6 HEADS. READY TO INSTALL. THE INTAKE IS FLOWING 250 CFM @ .550 LIFT AND THE EXHAUST IS FLOWING 200 CFM @ .550 THIS AUTION IS FOR A PAIR OF BRAND NEW LS1 CHEVY CYLINDER HEADS. THESE HEADS ARE COMPLETE HEADS READY TO BOLT ON. THESE HEADS ARE STAGE 1 PORTED AND POLISHED. THEY HAVE EXCELLENT FLOW. THESE HEADS WILL FIT ALL LS1 LS6 ENGINES FROM 97-UP. THESE HEADS CAME ON CORVETTES, CAMARO,TRANS AM ETC. THIS IS AN AWESOME SET OF HEADS FOR A GREAT PRICE. DON'T MISS OUT BECAUSE THEY WON'T LAST LONG. IF YOU HAVE ANY QUESTIONS THEN EMAIL ME AT landerson02@yahoo.com

These heads come with the following:

STAGE 1 PORTED & POLISHED
EXCELLENT PERFORMANCE
PERFORMANCE LS1 2.00 INTAKE VALVES
PERFORMANCE LS1 1.55 EXHAUST VALVES
VALVES ARE BACK CUT
CHROME VALVE SEATS
COMPETITION 3 ANGLE VALVE JOB. VALVE SPRINGS (GOOD TO .550 LIFT)
HARDENED RETAINERS
HARDENED LOCKS
HARDENED SEATS
VITON VALVE SEALS
EXCELLENT FLOW
INCREASED POWER
Head: 1997+ LS1 Cylinder Heads
Material: Aluminum
Part Number: 12559853 (1997-UP)
12559853

Common Short Number 853 and 241
Combustion Camber Volume 66.67cc
Compression Ratio 10.1:1
Intake Port Volume 200cc
Exhaust Port Volume 90cc
Intake Valve Diameter 2.00 inches
Exhaust Valve Diameter 1.55 inches
What you need to Know: The standard issue LS1 head is the best all around head for street or street/strip engines.