Nitrous HP Hydraulic Flat Tappet Camshaft Complete Kit Chevy Small Block 262-400ci 1955-98 Lift: .477"/.490"

Vehicle Info Needed

COMP CAMSPART NUMBER: 249-K12-560-4

Nitrous HP Hydraulic Flat Tappet Camshaft Complete Kit Chevy Small Block 262-400ci 1955-98 Lift: .477"/.490"

Name: Nitrous HP Hydraulic Flat Tappet Camshaft Complete Kit Chevy Small Block 262-400ci 1955-98 Lift: .477"/.490"
Brand: COMP CAMS
SKU: 249-K12-560-4
Price: 655.95 USD
Availability: InStock

^$655⁹⁵

Ships on 10/22/2026

Lowest Price Guarantee

Chevy Small Block 262-400ci 1955-98

Lift: .477"/.490"
Duration: 268°/286°
Lobe Separation Angle: 113°
RPM Range: 2000-6200

Street Machines with 125+ HP kit, needs stall, gears, choppy idle.
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

Street machines with 125+ hp kit, 2200+ stall, gears, choppy idle.

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

Designed to work with nitrous to give you the most power possible while still maintaining the low end torque and response needed in the street driven applications. This is accomplished by optimizing the opening and closing events of the valves and the individual lobe profiles to better use the additional fuel and oxygen provided with nitrous kits. Delivers excellent performance off nitrous and incredible gains with nitrous. Also ideal when used with forced induction.

Features:

Wider lobe separation and added exhaust duration from base XE series help shift the power to higher RPM to allow use in nitrous applications
Early exhaust opening helps scavenge the extra spent gasses from nitrous or forced induction
Better time slips for nitrous passes at the strip

Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

Small Kits are indicated by a SK in their part number and include Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals, and Instructions.

Part TypeCamshaft Kit

Product LineComp Cams Nitrous HP Cams

BrandCOMP CAMS

Package Height5.3

Package Width10.3

Package Length25.0

Weight20.8 PG

Part CategoryPerformance Parts

Exh. Duration @ .050 In. (Deg)236

Cam StyleHydraulic flat tappet

Grind NumberCS NX268H-13

Exh. Duration Advertised (Deg)286

Locks IncludedYes

Engine Make/SizeChevy Small Block (262-400)

Retainers IncludedYes

Intake Valve Lift With Factory Rocker Arm Ratio (I0.477

Int. Duration @ .050 In. (Deg)224

Assembly Lubricant IncludedYes

Basic Operating Rpm Range2,000-6,200

Pushrods IncludedNo

Gaskets IncludedNo

Rocker Arms IncludedNo

Intake Valve Lift0.477 in (12.116 mm)

Computer-Controlled CompatibleNo

Int. Duration Advertised (Deg)268

Lobe Separation (Deg)113

Rpm Range2000-6200

Lifter StyleHydraulic flat tappet

Advertised Duration268 int./286 exh.

Exhaust Valve Lift With Factory Rocker Arm Ratio (0.49

Valve Springs IncludedYes

UsageStreet/Strip

Valve Lift With Factory Rocker Arm Ratio0.477 int./0.490 exh.

QuantitySold as a kit

Valve Stem Seals IncludedYes

Exhaust Valve Lift0.49 in (12.446 mm)

Advertised Intake Duration268

Outside Diameter Of Outer Spring1.254 in (31.9 mm)

Intake Duration At 050 Inch Lift224

Exhaust Duration At 050 Inch Lift236

Timing Chain StyleDouble non-roller

Timing Chain And Gears IncludedYes

Advertised Exhaust Duration286

Lifter TypeHydraulic Flat Tappet

Part FitmentSemi Universal

Duration At 050 Inch Lift224 int./236 exh.

Valve Springs RequiredNo

Lifters IncludedYes

Vendor Part NumberK12-560-4

Package Qty1

Package TypeEA

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