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COMP Cams 1831-1 Ultra Pro Magnum XD Roller Rocker Arm Ratio Ford Small Block - 1.6

(Ford Mustang 1964-73, 1979, 1982-2011, Thunderbird 1977-81, 1983-88, 1991-93, Maverick 1971-77, Galaxie 500 1963-74, Fairlane 1963-70 + 43 more models)

Part of: COMP Cams Ultra Pro Magnum XD Roller Rocker Arm Ratio Ford Small Block

Other options in this family: COMP Cams 1834-1 COMP Cams 1833-1

Manufacturer

Picture for manufacturer COMP Cams

Part Number

1831-1
12 reviews
Sale Price

$52.95

In Stock (7)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The COMP Cams Ultra Pro Magnum XD roller rocker arm is engineered for high-performance Ford small block engines including 289, 302, and 351W applications. This precision rocker arm features a 1.6:1 ratio design that increases valve lift for improved airflow and power output compared to stock rockers.

Key Features:

  • High-strength extruded aluminum body with CNC-machined contact surfaces for precise geometry
  • Needle bearing roller tip reduces friction and side loading on valve stems
  • 1.6:1 rocker ratio provides approximately 7% increase in valve lift over stock 1.5 ratio rockers
  • Designed for use with 3/8" rocker studs on Ford small block V8 engines
  • Self-aligning roller tip design accommodates stud misalignment and reduces wear
  • Heat-treated steel trunnion with needle bearings for maximum durability
  • Includes rocker arm body with integrated roller tip assembly

The Ultra Pro Magnum XD series delivers professional-grade performance and reliability for street/strip applications, high-performance street engines, and racing builds. Compatible with both hydraulic and solid lifter camshafts when proper pushrod length and geometry are maintained. Sold individually—order quantity required for complete engine build.

Products specifications

Fits

Ford Mustang 1964-73, 1979, 1982-2011, Thunderbird 1977-81, 1983-88, 1991-93, Maverick 1971-77, Galaxie 500 1963-74, Fairlane 1963-70, Torino 1968-76, Mustang II 1975-78, Falcon 1964-70, Galaxie 1963-67, Gran Torino 1972-76 + 38 more models

AMAZON ASIN

B0066T1REC

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

Rocker Stud Diameter

3/8

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.

Rocker Arm Material

8650 Chromemoly Steel

Rocker Arm Ratio

1.6

Rocker Arm Series

Ultra Pro Magnum XD

Engine Family

Ford 289-351W

Maximum Valve Spring Open Pressure

1000

A service

Very good prices and quick, easy ordering experience.

Very pleasant.

didn't add shipping like other site did after saying free shipping

very low prices

easy website with great search engine and amazon check-out

Best Price, Fast shipping, couldn't ask for anything more.

They are excellent. They were able to send out my item as early as the next day. I am anticipating my product by early next week. Great!

Fast Shipping and great price. The parts were described correctly also. I would and will do business with them again.

Great!!

I'll admit to being skeptical at first, but the price was worth the risk. Turned out to be one of the best online transactions I've experienced. Received item 3 days after purchaseing and the best price I found. And I looked hard! A+

Fast service and great prices. knowledgable sales persons, Hugh in stock items. Packing was excellent, doubled boxed.

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