CR557

Description

• Mid/High
• big bore motors 124ci – up.
• The opening and closing ramps are different profiles to reduce valve bounce and valve spring harmonics. Replaces the CR540 & CR540-2.
•  2800-6500rpm
• 11.3 to 11.8:1 static compression.
• Add ported cylinder heads, big throttle body, high performing exhaust and get ready to hang on! You’re on your way to a 160 Horsepower pump fuel build