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Vehicle Info NeededCOMP CAMSPART NUMBER: 249-12-821-14
Drag Race Mechanical Roller Camshaft Lift .679"/.645" Duration 312/325 RPM Range 5000-7500
$60395
3 left in stock
Ships on Sep 14, 2026
Lowest Price GuaranteeChevy 262-400ci Small Block 1955-98 4&7 Swap Firing Order (.900" Base Circle)
- Drag Race Mechanical Roller Camshaft
Lift .679"/.645"
Duration 312/325
RPM Range 5000-7500
*Note: DRAG RACE .900" BASE CIRCLE Mechanical Roller Camshafts with 18736542 Firing Order 4 & 7 swap firing order.
**Note: Requires upgraded gear, thrust button & wear plate.
350-400ci, 5000+ stall converter, 11.5:1 compression, ported heads.
| Operating Range: | 5000-7500 RPM |
| Duration Advertised: | 312° Intake / 325° Exhaust |
| Duration @ .050' Lift: | 279° Intake / 286° Exhaust |
| Valve Lift w/1.5 Rockers: | .679' Intake / .645' Exhaust |
| Valve Setting: | .024' Intake / .026' Exhaust |
| Lobe Separation Angle: | 108° |
265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10
400+ c.i. engines, good heads, high compression, .900" base circle.
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 Height2.8
Package Width3.0
Package Length24.2
Weight8.23 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)286
Cam StyleMechanical roller tappet
Grind NumberCS 47S 312-R8 .900 BASE CIRCLE
Exh. Duration Advertised (Deg)325
Engine Make/SizeChevy Small Block (262-400)
Intake Valve Lift With Factory Rocker Arm Ratio (I0.679
Int. Duration @ .050 In. (Deg)279
Basic Operating Rpm Range5,000-7,500
Intake Valve Lash0.024 in (0.61 mm)
Intake Valve Lift0.679 in (17.247 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)312
Lobe Separation (Deg)108
Rpm Range5000-7500
Advertised Duration312 int./325 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.645
UsageStrip
Valve Lift With Factory Rocker Arm Ratio0.679 int./0.645 exh.
QuantitySold individually
Exhaust Valve Lash0.026 in (0.66 mm)
Exhaust Valve Lift0.645 in (16.383 mm)
Advertised Intake Duration312
Intake Duration At 050 Inch Lift279
Exhaust Duration At 050 Inch Lift286
Advertised Exhaust Duration325
Lifter TypeMechanical Roller
Part FitmentSemi Universal
Duration At 050 Inch Lift279 int./286 exh.
Valve Springs RequiredYes
Vendor Part Number12-821-14
Package Qty1
Package TypeEA
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