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Zippers Performance Products
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JIMS® Machining Roller Rockers

JIMS® Machining Roller Rockers

JIMS®
$0.00
JIMS® Roller Rocker arms are made from aerospace quality 4340 chrome moly steel, CNC machined and specially heat treated for durability. Critical areas of the arm are strengthened and material is removed where not needed for lighter weight. A roller tip made from bearing grade steel is incorporated to reduce valve and guide wear and 660 bronze bushings are used for stability, longevity and strength. Available for EV and Twin Cam® engines in stock 1.625:1, or higher 1.745:1 ratio for additional lift at the valve (modifications required). Shovel arms are 1.5:1 ratio. Uses stock or JIMS replacement rocker shafts (not included).
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JIMS® Rocker Arm Shafts

JIMS® Rocker Arm Shafts

JIMS®
$0.00
JIMS® rocker arm shafts are perfect for rebuilds or new construction, precision-ground right here in the USA. A special model for EV and Twin Cam® racing engines is available that is drilled and tapped on one end for grease fittings, designed to be used on engines that run “dry” top ends (no oil feed to the rocker arms). Sold each.
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JIMS® Iron XL Tappet Blocks

JIMS® Iron XL Tappet Blocks

JIMS®
$0.00
Precision machined, 7075-T651 billet tappet blocks feature helical style oil grooves for exceptional lubrication in the tappet bore. Polished or chrome finish, sold each.
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Zippers Performance Products

Zipper's is located in Elkridge, MD in the business park at the junction of MD100 and US1, just south of Baltimore.

6655-A Amberton Drive Elkridge, MD 21075
Phone: 410-579-2828
Open: Monday – Friday, 9am to 6pm EST

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