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Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e44x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603263934654,"sku":"031 502 460","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/031CH502_640a2629-9895-4bbf-9367-3e297b618979.jpg?v=1782949590"},{"product_id":"502-series-performance-head-w-seats-and-guides-42-intake-37-5-exhaust","title":"502 Series Performance Head W\/ seats and guides 42 Intake 37.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 502 Series Casting, It is set up to build the performance Head of your needs. 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Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e42x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603263967422,"sku":"031 502 440","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/031CH502_f27160b1-9b66-4756-b652-46c5d95821c1.jpg?v=1782949590"},{"product_id":"502-series-performance-head-w-seats-and-guides-40-intake-35-5-exhaust","title":"502 Series Performance Head W\/ seats and guides 40 Intake 35.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 502 Series Casting, It is set up to build the performance Head of your needs. 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Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e40x35.5\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (Replacement NGK Number is D8EA)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's:\u003c\/strong\u003e\u003cspan\u003e55\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603264000190,"sku":"031 502 420","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/031CH502_e408cda4-78d5-4098-a3bf-4b3f23a4a746.jpg?v=1782949591"},{"product_id":"502-series-performance-type-1-head-bare-no-seats","title":"502 Series Performance Type 1 Head Bare No seats","description":"\u003cp\u003e\u003cstrong\u003eAA 502 Series Casting, It is set up to build the performance Head of your needs. 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Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eCasting: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eAA 502\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003eN\/A\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603264032958,"sku":"031 CH 502","price":257.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/031CH502_27ff49f0-d296-4997-afac-bea8a001f469.jpg?v=1782949592"},{"product_id":"porsche-912-stock-head-38-intake-34-exhaust","title":"Porsche 912 Stock Head Complete, 38 Intake 34 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eBrand New Porsche 912 Stock Head. It comes complete with 38mm Intake and 34mm Exhaust valves and a 3 angle valve job. Built with New AA springs, retainers, keepers, and seals. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis Head is set up as an exact copy of the stock head with 14mm 1\/2 inch plugs, and will work as a stock replacement if you only need one head.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's:\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e60\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603279401150,"sku":"616 104 301 03AA","price":636.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/61610430103AAB-Front.jpg?v=1782949689"},{"product_id":"cylinder-head-stud-washer-8mm-ea","title":"Cylinder Head Stud Washer, 8mm, Ea","description":"\u003cp\u003e\u003cstrong\u003eBrand New Cylinder Head Stud Washerfor 1200-1600cc engines. 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Sold each.\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603291951294,"sku":"111 101 461","price":1.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/111101461_d8a98b1e-44b6-479a-94ce-ac16048e9076.jpg?v=1782949782"},{"product_id":"cylinder-head-hex-nut-washer-set-10mm","title":"Cylinder Head Hex Nut \u0026 Washer Set, 10mm","description":"\u003cp\u003e\u003cstrong\u003eBrand New Cylinder Head Hex Nut \u0026amp; Washer Set for 10mm threaded blocks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSet Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(16) Cylinder Head Nuts, 10mm x 15mm.\u003c\/li\u003e\n\u003cli\u003e(16) Hardened thick washers, 10.5mm I.D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNuts available separately \u003ca href=\"https:\/\/aapistons.com\/products\/cylinder-head-hex-nut-10mm-ea\"\u003ehere\u003c\/a\u003e.\u003cbr\u003eWashers available separately \u003ca href=\"https:\/\/aapistons.com\/products\/cylinder-head-stud-washer-10mm-ea\"\u003ehere\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603292016830,"sku":"021 101 457-KIT","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/021101457-KIT.jpg?v=1782949784"},{"product_id":"cylinder-head-hex-nut-washer-set-8mm","title":"Cylinder Head Hex Nut \u0026 Washer Set, 8mm","description":"\u003cp\u003e\u003cstrong\u003eBrand New Cylinder Head Hex Nut \u0026amp; Washer Set for 8mm threaded blocks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSet Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(16) Cylinder Head Nuts, 8mm x 15mm.\u003c\/li\u003e\n\u003cli\u003e(16) Hardened thick washers, 8mm I.D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNuts available separately \u003ca href=\"https:\/\/aapistons.com\/products\/cylinder-head-hex-nut-8mm-ea\"\u003ehere\u003c\/a\u003e.\u003cbr\u003eWashers available separately \u003ca href=\"https:\/\/aapistons.com\/products\/cylinder-head-stud-washer-8mm-ea\"\u003ehere\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46603292082366,"sku":"043 101 457-KIT","price":18.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/043101457-KIT.jpg?v=1782949784"},{"product_id":"cylinder-head-hex-nut-10mm-ea","title":"Cylinder Head Hex Nut, 10mm, Ea","description":"\u003cp\u003e\u003cstrong\u003eBrand New Cylinder Head Hex Nut, 10mm x 15mm. 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They are ready to install.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMade from an AMC 1.8L type4 casting with breather using 8mm valvestems .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe heads can also be opened to 103 to accommodate the larger bore sizes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine: \u003c\/strong\u003e VW Type 4 \/ Porsche 914 1.8L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSprings: \u003c\/strong\u003eDual High Rev\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValves: \u003c\/strong\u003e48mm Intake by 38mm Exhaust\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAMC 1.8L\u003cspan\u003eSquare Port\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e14mm (Replacement Bosch Number is W8CCor NGKis B5ES.)\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e94, works with 94 \u0026amp; 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The heads can also be opened to 103 to accommodate the larger bore sizes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine: \u003c\/strong\u003eVW Type 4 \/ Porsche 914 1.8L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSprings: \u003c\/strong\u003eSingle High rev\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValves: \u003c\/strong\u003e44mm Intake by 36mm Exhaust\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 2.0L \u003cspan\u003eRound Port\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e14mm (Replacement Bosch Number is W8CCor NGKis B5ES.)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e94, works with 94 \u0026amp; 96mm Kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e103works with103, 104, \u0026amp; 105mm Kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC:\u003c\/strong\u003e\u003cspan\u003e55\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Pick Bore size, when ordering Above\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"94 Bore","offer_id":46603450286270,"sku":"022 450 94B X2","price":1339.9,"currency_code":"USD","in_stock":false},{"title":"103 Bore","offer_id":46603450319038,"sku":"022 450 103B X2","price":1367.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/022-071Type4Heads_502741c4-2f2e-4858-9abb-5f8cfb74b715.jpg?v=1782950759"},{"product_id":"set-of-aa-vw-type-4-porsche-914-performance-cylinder-heads-42x36","title":"Set of AA VW Type 4 Porsche 914 Performance Cylinder Heads, 42X36, Round Port","description":"\u003cp\u003e\u003cstrong\u003eThis is a brand new Set of 2 High Performance Cylinder Heads for a VW Type 4 \u0026amp; Porsche 914 1.8L . 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The heads can also be opened to 103 to accommodate the larger bore sizes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEngine: \u003c\/strong\u003eVW Type 4 \/ Porsche 914 1.8L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSprings: \u003c\/strong\u003eSingle high rev\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValves: \u003c\/strong\u003e42mm Intake by 36mm Exhaust\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 2.0L Round Port\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e14mm (Replacement Bosch Number is W8CCor NGKis B5ES.)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e94, works with 94 \u0026amp; 96mm Kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e103works with103, 104, \u0026amp; 105mm Kits\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC:\u003c\/strong\u003e\u003cspan\u003e55\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Pick Bore size, when ordering Above\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"94 Bore","offer_id":46603450417342,"sku":"022 445 94B X2","price":1339.9,"currency_code":"USD","in_stock":true},{"title":"103 Bore","offer_id":46603450450110,"sku":"022 445 103B X2","price":1367.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/022-071Type4Heads_ee25feca-132c-4bf7-b9b4-b82c5fec2686.jpg?v=1782950760"},{"product_id":"aa-2-0l-porsche-914-912e-aircooled-cylinder-head-3-stud","title":"AA 2.0L Porsche 914\/912E Aircooled Cylinder Head, 3 Stud","description":"\u003cp\u003e\u003cstrong\u003eThis is a brand new, High Performance\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003eCylinder Head for aPorsche 9142.0L. 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