{"title":"Cylinder Heads \u0026 Valvetrain 340\/390","description":"","products":[{"product_id":"valve-spring-dual-50lb","title":"Valve Spring, Dual, 50lb","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e12410\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eDual valve spring for high output motors. Install height 1.300\" with 50lb seat pressure. 120lbs open pressure. Coil bind at .600\". Change quantity to two if you want two outer and two inner springs. \u003c\/span\u003e\u003c\/p\u003e","brand":"Vegas Carts","offers":[{"title":"Default Title","offer_id":42955399748,"sku":"12410","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/DualSpring390.gif?v=1497629711"},{"product_id":"shim-029","title":"Shim, .029\"","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e14370\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eUse these shims under the valve spring to obtain proper install height. \u003c\/span\u003e\u003c\/p\u003e","brand":"ARC","offers":[{"title":"Default Title","offer_id":42955532612,"sku":"14370","price":1.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/Mar08-138.gif?v=1497629912"},{"product_id":"retainer-for-exhaust-valve-390","title":"Retainer for Exhaust Valve, 390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e\u003cstrong\u003e20180\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eStock exhaust valve retainer. Use on stock intake valve to accomodate lash cap. \u003c\/span\u003e\u003c\/p\u003e","brand":"Paraprop","offers":[{"title":"Default Title","offer_id":42955705732,"sku":"20180","price":0.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/Exhaust-Retainer390.gif?v=1497630155"},{"product_id":"retainer-keeper-set-390","title":"Retainer \u0026 Keeper Set, 390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e16370\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eThis retainer and keeper set is designed to be used with our stainless steel 390 valves. Will not work with stock valves. \u003c\/span\u003e\u003c\/p\u003e","brand":"SI Valves","offers":[{"title":"Default Title","offer_id":42956083524,"sku":"16370","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/Mar08-136.gif?v=1497630629"},{"product_id":"valve-seat-for-38mm-valve-gx390","title":"Valve Seat for 38mm Valve, GX390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e16410\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eThis valve seat replaces the stock intake valve seat. Use the 38mm intake valve with this seat. \u003c\/span\u003e\u003c\/p\u003e","brand":"SI Valves","offers":[{"title":"Default Title","offer_id":42957215364,"sku":"16410","price":2.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/valve-seat-in.gif?v=1497632591"},{"product_id":"chromoly-push-rods-390","title":"Chromoly Push Rods, 390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e16170\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eChromoly push rods are highly recommended when using an AGK racing cam.  Light weight with superior strength when building high output 390's. \u003c\/span\u003e\u003c\/p\u003e","brand":"Manton Pushrods","offers":[{"title":"Default Title","offer_id":42957449540,"sku":"16170","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/Mar08-140.gif?v=1497632901"},{"product_id":"cylinder-head-390-ported-milled","title":"Cylinder Head, 390, Ported \u0026 Milled","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e16130\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eCylinder head ported and milled. Increased flow and velocity from our porting makes this head an excellent choice for performance and value. Highly recommended performance upgrade for the racer looking to take his\/her GX340\/GX390 to the next level. \u003c\/span\u003e\u003c\/p\u003e","brand":"AGK","offers":[{"title":"Default Title","offer_id":42957926724,"sku":"16130","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/390-CYL-HEAD.gif?v=1497633446"},{"product_id":"head-dowel-gx390","title":"Head Dowel, GX390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e\u003cstrong\u003e24240\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eHead dowel for the Honda GX390. Price is for one dowel. \u003cb\u003eChange quantity if you want more than one.\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Paraprop","offers":[{"title":"Default Title","offer_id":42958038852,"sku":"24240","price":2.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/head-dowel.gif?v=1497633541"},{"product_id":"lifter-stock-gx390-1","title":"Lifter, Stock GX390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e\u003cstrong\u003e20560\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eGenuine Honda GX390 lifter. Big block motors in the 50hp range are wearing out the stock clone lifters. Use this genuine Honda lifter as a replacement. Sold individually. Change quantity to 2 if you want 2. \u003c\/span\u003e\u003c\/p\u003e","brand":"Paraprop","offers":[{"title":"Default Title","offer_id":42958187716,"sku":"20560","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/390-Lifter_b4367379-8106-41ea-9e48-f57d301a4db3.gif?v=1497633680"},{"product_id":"gasket-set-gx390","title":"Gasket Set, GX390","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e20160\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eEngine gaskets set for GX390. Includes head, side cover, valve cover, exhaust and both intake gaskets. \u003c\/span\u003e\u003c\/p\u003e","brand":"Paraprop","offers":[{"title":"Default Title","offer_id":42958370244,"sku":"20160","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/10-2007-066.jpg?v=1497633814"},{"product_id":"gasket-cylinder-head-steel-gx390","title":"Gasket, Cylinder Head, Steel, GX390","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003e\u003cstrong\u003e20390\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial,Helvetica;\" size=\"-1\" face=\"Arial, Helvetica\"\u003eSpecial steel cylinder head gasket. Use with high compression engines. Gasket is .050\" thick. \u003c\/span\u003e\u003c\/p\u003e","brand":"Paraprop","offers":[{"title":"Default Title","offer_id":42958929412,"sku":"20390","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2032\/4901\/products\/gasket-cyl-hd-390.gif?v=1497634230"}],"url":"https:\/\/www.affordablegokarts.com\/collections\/cylinder-heads-valvetrain-340-390.oembed","provider":"Affordable Go Karts","version":"1.0","type":"link"}