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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-51-316-4
Drag Race Hydraulic Flat Tappet Camshaft Lift: .562"/.577"
$30995
Ships on Sep 14, 2026
Lowest Price GuaranteePontiac 265-455ci 1955-81
- Drag Race Hydraulic Flat Tappet Camshaft
- Lift:.562"/.577"
- Duration: 296°/305°
- RPM Range: 3000-6500
Requires 3500+ RPM Stall Converter
10.5 to 1 Compression Ratio
4:10 or Lower Gear RatioPontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;
Rough idle, 3500+ stall, 10:1+ compression, 4:10 or lower gear ratio.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCamshaft
BrandCOMP CAMS
Package Height3.0
Package Width3.0
Package Length24.5
Weight9.2 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)253
Cam StyleHydraulic flat tappet
Grind Number296AH-8
Exh. Duration Advertised (Deg)305-3
Engine Make/SizePontiac 265-455
Intake Valve Lift With Factory Rocker Arm Ratio (I0.562
Int. Duration @ .050 In. (Deg)246
Basic Operating Rpm Range3,000-6,500
Intake Valve Lift0.562 in (14.275 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)296-3
Lobe Separation (Deg)108
Rpm Range3000-6000
Advertised Duration296 int./305 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.577
UsageStreet/Strip
Valve Lift With Factory Rocker Arm Ratio0.562 int./0.577 exh.
QuantitySold individually
Exhaust Valve Lift0.577 in (14.656 mm)
Advertised Intake Duration296
Intake Duration At 050 Inch Lift246
Exhaust Duration At 050 Inch Lift253
Advertised Exhaust Duration305
Lifter TypeHydraulic Flat Tappet
Part FitmentSemi Universal
Duration At 050 Inch Lift246 int./253 exh.
Valve Springs RequiredYes
Vendor Part Number51-316-4
Package Qty1
Package TypeEA
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