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Technical Articles for Part Number CCA-689-421-13
COMP Cams XFI AFM GM Gen IV Camshafts
Camshaft, Hydraulic Roller, Advertised Duration 278/290, Lift .500/.500, Chevy, Small Block L99, LMG, L94, Each
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Estimated Ship Date: Oct 30, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
689-421-13
Part Type:
Product Line:
Summit Racing Part Number:
CCA-689-421-13
UPC:
036584237907
Cam Style:
Hydraulic roller, OE roller
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Excellent responsiveness and mid-range power with across the board gains. Best choice for heavy vehicles and stock gearing.
Basic Operating RPM Range:
1,600-6,500
Intake Duration at 050 inch Lift:
216
Exhaust Duration at 050 inch Lift:
228
Duration at 050 inch Lift:
216 int./228 exh.
Advertised Intake Duration:
278
Advertised Exhaust Duration:
290
Advertised Duration:
278 int./290 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.500 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.500 in.
Valve Lift with Factory Rocker Arm Ratio:
0.500 int./0.500 exh.
Lobe Separation (degrees):
114
Camshaft Gear Attachment:
1-bolt
Remanufactured:
No
Computer-Controlled Compatible:
Yes
Grind Number:
274PIIHR14
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Single-bolt camshaft for GM LS Gen IV engines with Active Fuel Management and Variable Valve Timing.
COMP Cams XFI AFM GM Gen IV Camshafts
COMP Cams XFI AFM GM Gen IV camshafts are designed to work with the VVT (variable valve timing) and AFM (active fuel management) components of GM V8 engines. They deliver outstanding top-end power in modified L99-style applications without sacrificing low-end power when properly programmed. Get an increase in performance with the lobe profile of COMP Cams XFI AFM GM Gen IV camshafts.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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