{"product_id":"speed-kit-420-predator-or-ohv-13-15hp-clone-stage-4","title":"Speed Kit, 420 Predator or OHV \u0026 13\/15hp Clone, Stage 4","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003e\u003ca href=\"https:\/\/gokartsusa.biz\/pages\/speed-kit-selection-guide\" title=\"Speed Kit Selection Guide\" style=\"background-color: rgb(255, 255, 0);\"\u003eSpeed Kit Selection Guide\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis kit is similar to our Stage 3, but adds a ported and milled head with stainless valves, a stud kit, and heavy duty valve train components. Allows up to 35+ HP out of a 420 engine. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThis kit is for OHV engines and will not fit Hemis. \u003c\/b\u003e\u003cbr\u003e\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eKit Includes:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFully Ported and Milled Race Head \u003ci\u003e(Genuine Honda Core)\u003c\/i\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eHigh-Torque Genuine Honda Core\u003cspan\u003e \u003c\/span\u003e\u003ci\u003e(The Best!!)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh-Flow 36mm \/ 31mm Valves with Lash Caps\u003c\/li\u003e\n\u003cli\u003eDual Springs with Titanium Retainers\u003c\/li\u003e\n\u003cli\u003e307 Race Cam\u003c\/li\u003e\n\u003cli\u003eBlack Venom Aluminum Roller Rockers\u003c\/li\u003e\n\u003cli\u003eValve Cover Spacer\u003c\/li\u003e\n\u003cli\u003eChrome Moly Pushrods\u003c\/li\u003e\n\u003cli\u003eChoice of Carbs\u003cspan\u003e \u003c\/span\u003e\u003ci\u003e(Or use your own)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e90mm Forged Flat-Top Piston with Rings\u003c\/li\u003e\n\u003cli\u003eBillet Rod\u003cspan\u003e \u003c\/span\u003e\u003ci\u003e(+.040\" Longer)\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eOffset Timing Key\u003c\/li\u003e\n\u003cli\u003eCarb, Insulator, Head, and Case Gaskets\u003c\/li\u003e\n\u003cli\u003eARP Bolt Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003cbr\u003e*Note:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003eThis kit only fits 414 \u0026amp; 420cc (90mm) non-hemi engines. Filter should be sprayed with K\u0026amp;N type oil, especially in dirt applications. Oil not included. Billet aluminum flywheel REQUIRED. These kits are intended for experienced engine builders. Some clearance, fitment, or other engine building \"tricks\" may be needed. Picture for reference only. See above description for actual content.\u003cbr\u003e\u003cbr\u003e\u003ci\u003eDue to the head work required for this kit, please allow 1 week to ship.\u003c\/i\u003e\n\u003c\/div\u003e","brand":"GoKarts USA®","offers":[{"title":"No Carburetor \/ No Flywheel","offer_id":43060127039547,"sku":"NR-STAGE4KIT420-P-1","price":1200.0,"currency_code":"USD","in_stock":true},{"title":"No Carburetor \/ Add Aluminum Flywheel - Recoil Start","offer_id":43060127072315,"sku":"sku-52229537726780","price":1366.0,"currency_code":"USD","in_stock":true},{"title":"No Carburetor \/ Add Aluminum Flywheel - Electric Start","offer_id":43060127105083,"sku":"sku-52229537759548","price":1423.0,"currency_code":"USD","in_stock":true},{"title":"34mm Round Slide Mikuni - Gas \/ No Flywheel","offer_id":43060127137851,"sku":"NR-STAGE4KIT420-P-2","price":1394.0,"currency_code":"USD","in_stock":true},{"title":"34mm Round Slide Mikuni - Gas \/ Add Aluminum Flywheel - Recoil Start","offer_id":43060127170619,"sku":"sku-52229537792316","price":1560.0,"currency_code":"USD","in_stock":true},{"title":"34mm Round Slide Mikuni - Gas \/ Add Aluminum Flywheel - Electric Start","offer_id":43060127203387,"sku":"sku-52229537825084","price":1617.0,"currency_code":"USD","in_stock":true},{"title":"34mm Flat Slide Mikuni - Gas \/ No Flywheel","offer_id":43060127236155,"sku":"NR-STAGE4KIT420-P-3","price":1434.0,"currency_code":"USD","in_stock":true},{"title":"34mm Flat Slide Mikuni - Gas \/ Add Aluminum Flywheel - Recoil Start","offer_id":43060127268923,"sku":"sku-52229537857852","price":1600.0,"currency_code":"USD","in_stock":true},{"title":"34mm Flat Slide Mikuni - Gas \/ Add Aluminum Flywheel - Electric Start","offer_id":43060127301691,"sku":"sku-52229537890620","price":1657.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Gas \/ No Flywheel","offer_id":43060127334459,"sku":"NR-STAGE4KIT420-P-4","price":1536.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Gas \/ Add Aluminum Flywheel - Recoil Start","offer_id":43060127367227,"sku":"sku-52229537923388","price":1702.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Gas \/ Add Aluminum Flywheel - Electric Start","offer_id":43060127399995,"sku":"sku-52229537956156","price":1759.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Methanol \/ No Flywheel","offer_id":43060127432763,"sku":"NR-STAGE4KIT420-P-5","price":1622.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Methanol \/ Add Aluminum Flywheel - Recoil Start","offer_id":43060127465531,"sku":"sku-52229537988924","price":1759.0,"currency_code":"USD","in_stock":true},{"title":"33mm Mikuni Pumper - Methanol \/ Add Aluminum Flywheel - Electric Start","offer_id":43060127498299,"sku":"sku-52229538021692","price":1845.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0589\/5159\/8139\/files\/STAGE4KIT390-2_f4c905eb-bb4d-4a6d-85f1-faf911d402f9.png?v=1764893776","url":"https:\/\/gtcracing.com\/products\/speed-kit-420-predator-or-ohv-13-15hp-clone-stage-4","provider":"GTC Racing","version":"1.0","type":"link"}