Yella-Terra High Performance Roller Rockers for 83-04 Jeep® CJ-5, CJ-7, CJ-8 Scrambler, Wrangler YJ, TJ & Grand Cherokee ZJ, WJ with 258c.i. & 4.0L 6 Cylin - Quadratec
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Jeep Parts » Jeep Engine & Fuel System » Valves & Timing
   

Yella Terra
See all Yella Terra products


Fits These Vehicles

  • 83-90 CJ & Wrangler with 258 six cylinder engine
  • 91-02 Wrangler with 4.0L six cylinder engine
  • 93-04 Grand Cherokee with 4.0L six cylinder engine

Fits These Engines

  • AMC 4.2L I-6 Gasoline
  • Jeep 4.0L I-6 Gasoline

Installation

Installation Notes


Install Time: 2-4 Hours
Installation Instructions  Installation Instructions

Product Details

Yella-Terra Rockers will greatly enhance valve train durability especially in performance applications.

Traditional pressed steel rockers literally drag across the valve tips as the rockers open and close, causing high side loading on the valve. This inside force leads to irregular and rapid wear to valves, valve guides and valve seats . Roller tips on our Yella-Terra rockers eliminate side loading, resulting in quicker engine revs and a crisper exhaust note. Rocker fulcrums utilize roller bearings to greatly reduces friction in the valve train to provide a measurable power increase over standard rocker systems. Reduced friction lowers engine operating temperatures and a cooler-running engine. Aircraft-quality anodized aluminum extrusion arms are the strongest available. Ingeniously designed kits include quality hardware with easy instructions and can be fitted in around 1 hour with no head removal, machining or valve cover spacers required.
Made in Australia.

Parts Included

  • 12 Rocker Arms
  • Spacer Washers
  • Installation Hardware

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The following parts require additional handling charges due to their large size or weight: wheels, tires, full suspension lift kits, oversized bumpers, tire carriers, body tubs, hard tops and cargo racks. The following parts do not qualify for free shipping: Oversized items and items delivered by truck freight, as well as prior purchases and returns.

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* Free Shipping Special Offer Details To qualify for FREE shipping the parts on an individual order must meet a combined total value of $75 or more. Customer must select Standard Shipping in the checkout and ship to an address in the contiguous 48 United States. Some parts require additional handling charges due to their large size or weight: including wheels, tires, full suspension lift kits, oversized bumpers, tire carriers, body tubs, hard tops, cargo racks, winches and hitches. Oversized items, items that are delivered by truck freight, prior purchases and returns do not qualify for free shipping.