Xtreme Energy 284H Hydraulic Flat Tappet Camshaft Complete Kit Lift .507"/.510" Duration 284°/296° RPM Range 2300-6500

Vehicle Info Needed

COMP CAMSPART NUMBER: 249-K21-225-4

Xtreme Energy 284H Hydraulic Flat Tappet Camshaft Complete Kit Lift .507"/.510" Duration 284°/296° RPM Range 2300-6500

Name: Xtreme Energy 284H Hydraulic Flat Tappet Camshaft Complete Kit Lift .507"/.510" Duration 284°/296° RPM Range 2300-6500
Brand: COMP CAMS
SKU: 249-K21-225-4
Price: 712.95 USD
Availability: InStock

^$712⁹⁵

Ships on Oct 28, 2026

Lowest Price Guarantee

Currently Unavailable

This product is currently not available. Please call customer service for assistance at 1-800-345-4545.

Chrysler 383-440ci Big Block 1959-80
Single Bolt Gear

Lift

Duration

RPM Range

Produces Better Throttle Response
Produces Top Engine Horsepower
Delivers Increased Engine Vacuum
1 Year Limited Warranty
273, 360, 318, AMC, Dodge, Mopar, Plymouth, Dart, Road Runner, Charger, Challenger, 383, 400, 440, 426, HEMI, 426 Wedge, 426 HEMI, RB, B, HEMI, 392, Chrysler, LA

Street/strip, needs 2800+ stall, 9:1 compression, rough 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

Part TypeCamshaft Kit

BrandCOMP CAMS

Package Height5.4

Package Width10.5

Package Length25.3

Weight25.6 PG

Part CategoryPerformance Parts

Exh. Duration @ .050 In. (Deg)246

Cam StyleHydraulic flat tappet

Grind NumberCRB XE284H-10

Exh. Duration Advertised (Deg)296

Locks IncludedYes

Engine Make/SizeMopar 383-440

Retainers IncludedYes

Intake Valve Lift With Factory Rocker Arm Ratio (I0.507

Int. Duration @ .050 In. (Deg)240

Assembly Lubricant IncludedYes

Basic Operating Rpm Range2,300-6,500

Pushrods IncludedNo

Gaskets IncludedNo

Rocker Arms IncludedNo

Intake Valve Lift0.519 in (13.183 mm)

Computer-Controlled CompatibleNo

Int. Duration Advertised (Deg)284

Lobe Separation (Deg)110

Rpm Range2300-6500

Lifter StyleHydraulic flat tappet

Advertised Duration284 int./296 exh.

Exhaust Valve Lift With Factory Rocker Arm Ratio (0.51

Valve Springs IncludedYes

UsageStreet/Performance

Valve Lift With Factory Rocker Arm Ratio0.507 int./0.510 exh.

Camshaft Gear Attachment1-bolt

QuantitySold as a kit

Valve Stem Seals IncludedYes

Exhaust Valve Lift0.51 in (12.954 mm)

Advertised Intake Duration284

Outside Diameter Of Outer Spring1.525 in (38.7 mm)

Intake Duration At 050 Inch Lift240

Exhaust Duration At 050 Inch Lift246

Timing Chain StyleDouble non-roller

Timing Chain And Gears IncludedYes

Advertised Exhaust Duration296

Lifter TypeHydraulic Flat Tappet

Part FitmentSemi Universal

Duration At 050 Inch Lift240 int./246 exh.

Valve Springs RequiredNo

Lifters IncludedYes

Vendor Part NumberK21-225-4

Package Qty1

Package TypeEA

No Questions

No Reviews

Items You Need

JEGS

Universal Camshaft Installation/Removal Tool Includes 4 camshaft adapters

Part Number : 555-80599

^$47⁷⁹$51.99

You Save$4.20

JEGS

Break-In/Engine Oil Supplement [12 oz. Bottle]

Part Number : 555-28060

^$10⁰⁹$11.99

You Save$1.90

JEGS

Engine Assembly Lube [4 oz. Bottle]

Part Number : 555-28000

^$5⁸⁹$6.99

You Save$1.10

JEGS

Precision Cam Degree Wheel Kit [11 in.]

Part Number : 555-81621

^$146⁹⁹$161.99

You Save$15.00

COMP CAMS

159 Engine Break-In Oil Additive [12-Ounce]

Part Number : 249-159

^$23⁹⁵

JEGS

Valve Spring Compressor [Stud Mount]

Part Number : 555-80521

^$52⁹⁹$57.19

You Save$4.20

JEGS

Valvetrain Checking Springs Light tension springs

Part Number : 555-80523

^$8³⁹$8.99

You Save$0.60

JEGS

Valve Spring Compressor [Stud Mount]

Part Number : 555-80518

^$9¹⁹$9.99

You Save$0.80

JEGS