Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededCOMP CAMSPART NUMBER: 249-42-221-4
Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Only Lift .453"/.456" Duration 256°/268° RPM Range 1000-5200
$30995
Ships on Sep 15, 2026
Lowest Price GuaranteeOldsmobile 260-455 c.i. 8 cyl. 1967-1990
- Xtreme Energy 256H Hydraulic Flat Tappet Camshaft Only
Lift .453"/.456"
Duration 256°/268°
RPM Range 1000-5200
Hydraulic-Strong torque through low end and mid-range, good idle.
Olds; Oldsmobile; Cutlass; Cutlass Supreme; 98; Calais; Ciera; Custom Cruiser; Starfire; Firenza; 88; Rocket; Rocket 88; Vista Cruiser; Delta 88; 260; 442; 307; 350; 403; 400; 425; 455
Strong torque through low end and mid-range, good 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
BrandCOMP CAMS
Package Height2.8
Package Width3.3
Package Length24.3
Weight10.65 PG
Part CategoryPerformance Parts
Exh. Duration @ .050 In. (Deg)218
Cam StyleHydraulic flat tappet
Grind NumberOL XE256H-10
Exh. Duration Advertised (Deg)268
Engine Make/SizeOlds 260-455
Intake Valve Lift With Factory Rocker Arm Ratio (I0.453
Int. Duration @ .050 In. (Deg)212
Basic Operating Rpm Range1,000-5,200
Intake Valve Lift0.453 in (11.506 mm)
Computer-Controlled CompatibleNo
Int. Duration Advertised (Deg)256
Lobe Separation (Deg)110
Rpm Range1000-5200
Advertised Duration256 int./268 exh.
Exhaust Valve Lift With Factory Rocker Arm Ratio (0.456
UsageStreet/Performance
Valve Lift With Factory Rocker Arm Ratio0.453 int./0.456 exh.
QuantitySold individually
Exhaust Valve Lift0.456 in (11.582 mm)
Advertised Intake Duration256
Intake Duration At 050 Inch Lift212
Exhaust Duration At 050 Inch Lift218
Advertised Exhaust Duration268
Lifter TypeHydraulic Flat Tappet
Duration At 050 Inch Lift212 int./218 exh.
Valve Springs RequiredYes
Vendor Part Number42-221-4
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
![Break-In/Engine Oil Supplement [12 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28060.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80518.jpg)
![Valve Spring Compressor [Stud Mount]](https://www.jegs.com/images/mini_200/500/555/555-80521.jpg)
JEGS
Universal Camshaft Installation/Removal Tool Includes 4 camshaft adapters
Part Number : 555-80599
$4779$51.99
You Save$4.20
![Precision Cam Degree Wheel Kit [11 in.]](https://www.jegs.com/images/mini_200/500/555/555-81621.jpg)
![159 Engine Break-In Oil Additive [12-Ounce]](https://www.jegs.com/images/mini_200/200/249/249-159.jpg)
COMP CAMS
10° Super Lock Steel Retainers Valve Spring Diameter: 1.437" to 1.500"
Part Number : 249-740-16
$8695
ITEM YOU MAY ALSO CONSIDER
COMP CAMS
Xtreme Energy 268H Hydraulic Flat Tappet Camshaft Only Lift .485"/.490" Duration 268°/280° RPM Range 1600-5800
Part Number : 249-42-223-4
$30995
COMP CAMS
High Energy 268H Hydraulic Flat Tappet Camshaft Lift: .456" /.456" Duration: 268°/268° RPM Range: 1500-5500
Part Number : 249-42-229-4
$30995
COMP CAMS
Part Number : 249-42-223-4
$30995
COMP CAMS
Part Number : 249-42-229-4
$30995
Some parts are not legal for use in California or other states with similar laws / regulations
