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COMP Cams 42-221-4 Xtreme Energy Hydraulic Flat Tappet Camshaft Oldsmobile - for V8

(Pontiac Firebird 1977-79, Grand Prix 1977, Bonneville 1977-81, LeMans 1976-77, Catalina 1977-81, Ventura 1975-77, Parisienne 1986 + 31 more models)

Part of: COMP Cams Xtreme Energy Hydraulic Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 31-238-3 COMP Cams 35-238-3 COMP Cams 35-242-3 COMP Cams 51-222-4 COMP Cams 31-242-3

Manufacturer

Picture for manufacturer COMP Cams

Part Number

42-221-4
5 reviews
Sale Price

$309.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Xtreme Energy 42-221-4 is a hydraulic flat tappet camshaft engineered specifically for Oldsmobile V8 engines from 260 to 455 cubic inches. This performance camshaft delivers a significant boost in power and torque across the RPM range, making it an ideal upgrade for street performance applications, hot rods, and muscle car restorations.

Camshaft Specifications:

  • Advertised Duration: 268°/274° intake/exhaust
  • Duration at .050": 212°/218° intake/exhaust
  • Valve Lift: .447"/.465" intake/exhaust (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • RPM Range: 1,500-5,500 RPM
  • Hydraulic flat tappet design for reliable street performance

Key Features:

  • Xtreme Energy lobe profile for aggressive performance without sacrificing driveability
  • Increased lift and duration over stock for improved horsepower and torque
  • Designed for use with stock or aftermarket cylinder heads and intake manifolds
  • Compatible with factory hydraulic lifters or COMP Cams performance lifters
  • Provides excellent street manners with strong mid-range power
  • Works with stock compression ratios (9.0:1 minimum recommended)

This camshaft is ideal for daily drivers and weekend cruisers looking for a noticeable performance improvement without requiring extensive engine modifications. The Xtreme Energy series is designed to maximize torque and throttle response while maintaining smooth idle characteristics and good vacuum for power brakes. Recommended for use with 2,000-2,800 RPM stall converter and 3.23:1 or higher rear gear ratio for optimal performance.

Products specifications

Fits

Pontiac Firebird 1977-79, Grand Prix 1977, Bonneville 1977-81, LeMans 1976-77, Catalina 1977-81, Ventura 1975-77, Parisienne 1986, Bonneville (SE/SSE) 1977-81, Grand LeMans 1976-77, Grand Safari 1977-78, Safari 1987-89, Phoenix 1977 + 26 more models

Basic Operating RPM Range

1,000-5,200

Grind Number

XE256H

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.453

Exhaust Valve Lift

0.456

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL42-221-4

K-Kit Upgrade

K42-221-4

Engine Family

Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)

SK-Kit Upgrade

SK42-221-4

AMAZON ASIN

B002DFKPPK

Usage

Street/Performance

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

Lifters Included

No

LOBE SEPARATION

110

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

No

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Advertised Exhaust Duration

268

Intake Duration at .050 Inch Lift

212

Advertised Intake Duration

256

Exhaust Duration at .050 inch Lift

218

Camshaft Series

Xtreme Energy

product just as described, received in 3 days

I paid for 2nd day shipping and 5 days later they were shipped out. So, I should receive my rotors in a full week from when I paid for 2 day shipping. I called customer service and they discounted the shipping rate to ground service. At least they were polite and helpful in the phone.

Great

Great prices will shop here again.

Good prices and easy ordering process (order #18003). The only issue that I had was after placing the order, completing the entire process, I received three emails stating that "We noticed that you started checking out on our site, but didn't quite finish the process". After calling customer service, they ensured me that the order was complete. Since then, I receive the same email(3 emails at a time) on a daily basis. Just a little annoying, but easy enough to delete.

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