{"product_id":"v-twin-knucklehead-rocker-arm-set-11-1157-for-1938-1947-harley-davidson-el","title":"V-Twin Knucklehead Rocker Arm Set 11-1157 for 1938-1947 Harley-Davidson EL","description":"Machined Knucklehead rocker arm set.\n\u003cp\u003eThe V-Twin 11-1157 Knucklehead Rocker Arm Set is designed for 1936-1937 valve spring cup and cap style covers where the rocker arms remain exposed. The center portion of each rocker arm is turned down to 0.80 inch, excluding the seal surface on the pushrod side, to provide additional clearance for 1938-1947 model lower tin covers. This set includes four rocker arms and is intended for applicable Harley-Davidson EL Knucklehead engine applications.\u003cbr\u003eThe right-side rocker arm features a ground outer diameter at the seal surface for single-point seal contact. Before installation, re-surface the head gasket by fly cutting or Blanchard grinding. Verify the bore size and select the appropriate standard, 0.010-inch oversize, or 0.020-inch oversize configuration as required. The rivet head that plugs the oil passage holes must also be removed before installation. Follow the included installation instructions for proper preparation and assembly procedures: http:\/\/www.vtwinmfg.com\/Instructions\/11\/11-1157.pdf\u003cbr\u003eThis V-Twin rocker arm set is a practical replacement and performance-oriented component for restoring or servicing compatible Knucklehead engines. It fits 1938 through 1947 Harley-Davidson EL models and is supplied as a four-piece set. Confirm engine specifications, cover clearance, bore requirements, and installation conditions before ordering. Manufactured in Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: V-Twin\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 11-1157\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: Knucklehead rocker arm set for exposed rocker arms and compatible lower tin covers\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFitment: 1938-1947 Harley-Davidson EL\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eConstruction: Four-piece rocker arm set\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eClearance Design: Center portion turned down to 0.80 inch, excluding the pushrod-side seal surface\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSeal Surface: Right-side arm has a ground outer diameter for single-point seal contact\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eInstallation Requirement: Re-surface the head gasket by fly cutting or Blanchard grinding before installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBore Preparation: Re-check bore size for standard, 0.010-inch oversize, or 0.020-inch oversize applications\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eOil Passage Preparation: Remove the rivet head plugging the oil passage holes\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eUnit of Measure: Set\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCountry of Origin: Taiwan\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAccessory Items: 49-1301 - Knucklehead Rocker Box Set, 11-0598 - Knucklehead Tappet Block Kit\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitment\u003cbr\u003e\nHarley Davidson EL  1938\u003cbr\u003e\nHarley Davidson EL  1939\u003cbr\u003e\nHarley Davidson EL  1940\u003cbr\u003e\nHarley Davidson EL  1941\u003cbr\u003e\nHarley Davidson EL  1942\u003cbr\u003e\nHarley Davidson EL  1943\u003cbr\u003e\nHarley Davidson EL  1944\u003cbr\u003e\nHarley Davidson EL  1945\u003cbr\u003e\nHarley Davidson EL  1946\u003cbr\u003e\nHarley Davidson EL  1947\u003cbr\u003e\nHarley Davidson FL  1940\u003cbr\u003e\nHarley Davidson FL  1941\u003cbr\u003e\nHarley Davidson FL  1942\u003cbr\u003e\nHarley Davidson FL  1943\u003cbr\u003e\nHarley Davidson FL  1944\u003cbr\u003e\nHarley Davidson FL  1945\u003cbr\u003e\nHarley Davidson FL  1946\u003cbr\u003e\nHarley Davidson FL  1947","brand":"V-Twin","offers":[{"title":"Default Title","offer_id":67632718250169,"sku":"11-1157","price":535.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-1157a.jpg?v=1790973288","url":"https:\/\/atticusgoods.com\/products\/v-twin-knucklehead-rocker-arm-set-11-1157-for-1938-1947-harley-davidson-el","provider":"Atticus Goods","version":"1.0","type":"link"}