{"product_id":"jeep-cherokee-grand-wagoneer-j-series-cylinder-heads-ede60139","title":"Performer RPM Bare Cylinder Head \u003cbr\u003e 82-91 Jeep Cherokee Grand Wagoneer J-Series","description":"\u003cb\u003eDescription:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eThe Edelbrock 60139 Performer RPM cylinder head is designed as a bolt-on performance upgrade for any 1967-91 AMX, Javelin or Jeep with a 343, 360, 390 or 401 AMC V8 engine. They include adjustable rocker studs and guide plates set-up for use with small-block Ford style adjustable 1.6:1 ratio rockers. The intake flange is dual-drilled to accommodate early and late model intake bolt patterns, covering 1967-91. A Complete head includes larger than- stock valve springs to handle most high-lift cams. They feature stock location ports for compatibility with standard manifolds and headers. A direct bolt-on for 1970 and later engines with 1\/2 head bolts, This head includes step-dowel pins for pre-1970 engines. Their dual-quench combustion chambers produce approximately 9.5:1 compression in 401 V8 engines. The 45deg intake seat angle offers improved mid- to high-lift flow over the stock 30deg angle. The Edelbrock 601139 Performer RPM cylinder head has a machined heat crossover for 50-state emissions legal performance.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eSpecifics and Features:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cli\u003eCamshaft Type: Flat Tappet\u003c\/li\u003e\n\u003cli\u003eCNC Ported: No\u003c\/li\u003e\n\u003cli\u003eConstruction Type: Complete\u003c\/li\u003e\n\u003cli\u003eDeck Thickness: 0.625 IN\u003c\/li\u003e\n\u003cli\u003eEGR Port: Yes\u003c\/li\u003e\n\u003cli\u003eExhaust Port Location: Standard\u003c\/li\u003e\n\u003cli\u003eExhaust Runner Volume: 70 CCM\u003c\/li\u003e\n\u003cli\u003eExhaust Valve Diameter: 1.60 IN\u003c\/li\u003e\n\u003cli\u003eFamily: Performer\u003c\/li\u003e\n\u003cli\u003eGuide Material: Manganese Bronze\u003c\/li\u003e\n\u003cli\u003eGuide Plate Material: Hardened Steel\u003c\/li\u003e\n\u003cli\u003eHorsepower: 300-450 HJ\u003c\/li\u003e\n\u003cli\u003eIntake Valve Diameter: 2.02 IN\u003c\/li\u003e\n\u003cli\u003ePush Rod Diameter: (Suggested) 0.3125 IN\u003c\/li\u003e\n\u003cli\u003eQuantity: Sold Individually\u003c\/li\u003e\n\u003cli\u003eRetainer Included: Yes\u003c\/li\u003e\n\u003cli\u003eRocker Arm Stud Diameter: 0.375 IN\u003c\/li\u003e\n\u003cli\u003eSeat Angle: Exhaust 45 deg\/Intake 45 DD\u003c\/li\u003e\n\u003cli\u003eSeat Material: Ductile Iron\u003c\/li\u003e\n\u003cli\u003eSeries: Performer\u003c\/li\u003e\n\u003cli\u003eValve Angle: 18 DD\u003c\/li\u003e\n\u003cli\u003eValve Lock Material: Steel\u003c\/li\u003e\n\u003cli\u003eValve Spring Diameter: 1.55 IN\u003c\/li\u003e\n\u003cli\u003eValve Spring Maximum Lift: 0.580 IN\u003c\/li\u003e\n\u003cli\u003eValve Stem Diameter: 0.34375 IN\u003c\/li\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Includes:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cli\u003eEdelbrock AMC Cylinder Head\u003c\/li\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eCompatible With:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cli\u003e1974-1983 Jeep Cherokee\u003c\/li\u003e\n\u003cli\u003e1984-1991 Jeep Grand Wagoneer\u003c\/li\u003e\n\u003cli\u003e1974-1988 Jeep J10 J20\u003c\/li\u003e\n\u003cli\u003e1972-1983 Jeep Wagoneer\u003c\/li\u003e\n\u003cli\u003e1972-1973 Jeep J-4800 J-2500 J-2600\u003c\/li\u003e\u003cbr\u003e\u003cbr\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":52773697847659,"sku":"EDE-60139","price":1414.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1961\/1987\/files\/EDE-60139-1.jpg?v=1768812248","url":"https:\/\/caautoparts.com\/products\/jeep-cherokee-grand-wagoneer-j-series-cylinder-heads-ede60139","provider":"CA Auto Parts","version":"1.0","type":"link"}