Jeep 4.0 rocker arm upgrade

Description

TD Motion Offers

Harland Sharp Jeep 4.0 Roller Rocker Kit

True Rocker Arms are Pedestal Mount Aluminum, 1.6 Ratio, Set of 12. Less friction & Less Heat leads to more power for your Jeep!!. Direct Bolt-on for your 4.0 & 4.6 Jeep Stroker Engine.

Table of Contents Show

Description
TD Motion Offers
Harland Sharp Jeep 4.0 Roller Rocker Kit
Do changing rocker arms increase horsepower?
What does increasing rocker arm ratio do?
Do roller rockers make a difference?
What is the advantage of roller rocker arms?

INCLUDES:

Full Set of 12 Orange Anodized Roller Rockers and Hardware. Direct Bolt on replacement from Stock Rockers for your 4.0 and 4.6 Jeep. Work nicely with Edelbrock Aluminum Cylinder heads or Factory Heads.

PRODUCT COMPATIBILITY:

1987-2005 Jeep Six Cylinder 4.0 Engines

Fits early applications with some minor Mods.

COMPATIBILITY
YEAR	MAKE/MODEL
1987 – 2001	Jeep Cherokee
1987 – 1992	Jeep Comanche
1987 – 1990	Jeep Wagoneer
1991 – 2006	Jeep Wrangler

BENEFITS:

Harland Sharp developed and manufactured the first aluminum needle bearing Roller Tip Rocker Arms in 1960. Since then, thousands of racing enthusiasts have experienced the quality and precision of every Harland Sharp rocker arm. Features include, full needle bearing roller fulcrum, roller tip, and consistent ratios to reduce friction, wear, and to stabilize valve timing.

The unique Friction Free Design gives you average gains of 15 to 40 HP. Made In The USA!

Jeep®, Wrangler, Rubicon, Renegade, CJ, Quadra-Trac and the Jeep grille design are registered trademarks of FCA (Fiat Chrysler Automobiles). Quadratec, Inc, has no affiliation with FCA. Throughout this website and catalog the terms Jeep®, Wrangler, MOPAR®, & Rubicon are used for identification purposes only. Transparency in Coverage Machine Readable File

Designed to fit 232ci, 25Bci & 4.0L engines
Aerospace grade 7000 series billet aluminum body
Precision ground needle roller bearings
Centerless ground fulcrum and roller
Bearing quality ground 100 carbon steel pin
Steel dual pedestal ensures correct rocker arm to valve alignment
Available in both adjustable & non-adjustable configurations
Body geometry optimized to deliver a true 1.6 ratio
5/16″ mounting hardware included
Will handle 380 lbs of open valve spring pressure (max recommended spring pressure for 5/16 fastener)
Will clear stock valve cover (with removal of internal PCV baffle)
MADE IN THE USA!

Adjustment

Ratio

Stud Size

$37.99

$41.99

$418.22

$451.32

$418.22

$451.32

Do changing rocker arms increase horsepower?

You can easily gain 20 horsepower with a rocker arm swap, but installing them isn't quite as simple as removing the stock rockers and bolting on new ones. For seasoned car guys, it's a quick process, but if you're new to the task of setting valve lash you might want to take some notes before you tackle the project.

What does increasing rocker arm ratio do?

An increase in rocker arm ratio nets more than additional lift. It will also change the cam's duration characteristics. Because the increased ratio effectively speeds up valve movement, that means the valve will reach any opening height sooner than it would with a lower-ratio rocker arm.

Do roller rockers make a difference?

Besides the potential power benefits of an increase in rocker ratio, roller rockers have several additional power-adding advantages compared with a stamped rocker. The advertised ratio of aftermarket roller-tip rockers is more accurate than the claimed ratio of typical stock stamped rockers.

What is the advantage of roller rocker arms?

A roller rocker has a small roller that rolls over the end of the valve stem. This virtually eliminates side load on the stem and greatly reduces wear. Another area of high friction and wear is between the rocker arm and rocker shaft.

jeep rocker arm upgrade