Add the famous classic teardrop air cleaner assembly to your ride - available separately from the S&S Air Filter Kits for repairs or maintenance. Choose either ventilated chrome or standard chrome cover.
When it comes to high performance valves, Pro-Street out shines the competition. One-piece stainless impregnated by a special German process (.002 deep and .0002 surface build-up) to improve wear performance in cast iron or nickel-bronze guides.
Cometic® Gasket Sets for Shovelhead & Ironhead Sportster® Engines - These gaskets are used in critical sealing surfaces such as rocker box and cylinder base gaskets. Head gaskets included with these kits are Cometic’s ‘MLS’ ("Multi-Layer Steel’) gaskets. The balance of components included with these kits are made from the highest quality materials to ensure that your engine stays leak-free.
Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
Cometic’s ‘MLS’ (Multi-Layer Steel’) gaskets are 3-piece head gaskets that are made up of a stainless steel center sandwiched by two viton-coated spring steel embossed outer layers for a seal that can withstand the shearing forces created in the head gasket environment. Non-intrusive rivets hold the combination together. Sold in 2 different thicknesses, .040” (standard) and .030” (high compression). Piston-to-head clearance should be verified (.030”-.032” optimum) before using .030” gaskets. Sold in pairs.
Cometic® Gasket Sets for Shovelhead & Ironhead Sportster® Engines - These gaskets are used in critical sealing surfaces such as rocker box and cylinder base gaskets. Head gaskets included with these kits are Cometic’s ‘MLS’ ("Multi-Layer Steel’) gaskets. The balance of components included with these kits are made from the highest quality materials to ensure that your engine stays leak-free.
Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
The Thunderbolt nosecone internal ignition is designed to fit all Evolution® '86-'99 Big Twin and '86-'03 Sportster® models, as well as ‘70-'84 Shovelhead and ‘71-'85 Iron XL’s. It is fully contained within the cam cover, replacing the externally mounted module on all models originally equipped with electronic ignitions.
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Engine Rebuild Parts
Quality bearings, bushings, races and other parts for engine rebuild and upgrades. Proven parts that will provide years of faithful service.
These replacement ring sets by Hastings are the same as supplied in every new Harley-Davidson® motorcycle engine. The top ring is a barrel faced, moly filled design from which long life, proper lubrication & scuff free service can be expected. The 2nd ring is reverse torsion type; oil ring is the famous Hastings ‘Flex-Vent’ 3-piece design, which exerts uniform pressure on the cylinder wall while providing 200% more drainage capacity than conventional one-piece oil rings. Sold in sets for 2 pistons.
James® Complete Engine Gasket Sets include 1-piece coated composite head gaskets, coated metal rocker box and cylinder base gaskets (except Iron XL®); EV models include rubber rocker layer gaskets.
Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
James® Top End Gasket Sets include 1-piece coated composite head gaskets, coated metal rocker box and cylinder base gaskets (except Iron XL®); EV models include rubber rocker layer gaskets.
Zipper's Performance stocks most all gaskets, seals and o-rings individually. Contact Us with your specific needs!
These replacement ring sets by Hastings are the same as supplied in every new Harley-Davidson® motorcycle engine. The top ring is a barrel faced, moly filled design from which long life, proper lubrication & scuff free service can be expected. The 2nd ring is reverse torsion type; oil ring is the famous Hastings ‘Flex-Vent’ 3-piece design, which exerts uniform pressure on the cylinder wall while providing 200% more drainage capacity than conventional one-piece oil rings. Sold in sets for 2 pistons.
505XL: Performance cams for 61-74” Iron Sportster® engines (can also be configured for XR1000 engines). Compliments ported heads, increased compression, high flow carb and exhaust. Extra-wide powerband with great dynamics.
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
Replacement back plates for S&S air filter kits. Available separately for repairs or maintenance.
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
S&S air cleaners for stock carb and S&S E/G carbs--add the famous classic teardrop air cleaner assembly to your ride. Replacement back plates, covers and filter elements for S&S applications available separately for repairs or maintenance.
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
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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.
Piston kits include rings, wrist pins and circlips.
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.