{"product":{"id":11350203007318,"title":"Kooks Fox Mustang 351W Headers, 3-inch Inline Bolt Pattern | 10252450","body_html":"\u003ch2\u003eGive your 351 Windsor the headers it needs\u003c\/h2\u003e\u003cp\u003eA 351-powered Fox Mustang is about the engine as much as the car. These Kooks headers are built around a 9.5-inch-deck Windsor with the correct aftermarket heads, using 1-7\/8-inch primaries and 3-1\/2-inch collectors for a properly matched conversion.\u003c\/p\u003e\u003cp\u003eSKU: 10252450\u003c\/p\u003e\u003ch2\u003eMatch the cylinder heads first\u003c\/h2\u003e\u003cp\u003e10252450 uses a 3-inch inline bolt pattern at stock port height, for the specified Dart \/ World 210 \/ 225 or Pro Topline heads. This is a head-pattern choice as well as a tube-size choice. The 16-gauge 304 stainless headers include gaskets and bolts.\u003c\/p\u003e\u003ch2\u003eMake room for the conversion\u003c\/h2\u003e\u003cp\u003eA UPR or BMR Standard tubular K-member, Powermaster 9503 starter and Flaming River steering shaft are required. A Stifflers transmission crossmember is recommended. Engine mounting position and lowering affect ground clearance; mount shims may be needed to achieve the right clearance.\u003c\/p\u003e\u003ch2\u003eTuning for your exhaust upgrade\u003c\/h2\u003e\u003cp\u003eWe recommend tuning with every header installation so the calibration suits your headers, complete exhaust and fuel. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eTalk to us\u003c\/a\u003e to discuss tuning for your vehicle and the parts you are fitting.\u003c\/p\u003e\u003ch2\u003eVehicle fitment\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"vehicle-fitment\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVehicle \/ trim\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApplicable SKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1979-1993\u003c\/td\u003e\n\u003ctd\u003eFord Mustang\u003c\/td\u003e\n\u003ctd\u003eInstalled 351 Windsor, 9.5-inch deck\u003c\/td\u003e\n\u003ctd\u003e10252450\u003c\/td\u003e\n\u003ctd\u003e351W 9.5-inch-deck conversion; 3-inch inline stock-port-height heads; required K-member, starter and steering shaft detailed in copy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1979-1986\u003c\/td\u003e\n\u003ctd\u003eMercury Capri\u003c\/td\u003e\n\u003ctd\u003eInstalled 351 Windsor, 9.5-inch deck\u003c\/td\u003e\n\u003ctd\u003e10252450\u003c\/td\u003e\n\u003ctd\u003e351W 9.5-inch-deck conversion; 3-inch inline stock-port-height heads; required K-member, starter and steering shaft detailed in copy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"technical-specifications\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e10252450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e1979-1993 Ford Mustang \/ 1979-1986 Mercury Capri engine conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine \/ deck height\u003c\/td\u003e\n\u003ctd\u003e351 Windsor; 9.5-inch deck\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader primary diameter\u003c\/td\u003e\n\u003ctd\u003e1-7\/8-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector diameter\u003c\/td\u003e\n\u003ctd\u003e3-1\/2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader bolt pattern\u003c\/td\u003e\n\u003ctd\u003e3-inch inline; stock port height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder heads\u003c\/td\u003e\n\u003ctd\u003eDart \/ World 210 \/ 225 and Pro Topline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e16-gauge tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eHeader gaskets and bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired chassis parts\u003c\/td\u003e\n\u003ctd\u003eUPR or BMR Standard tubular K-member, Powermaster 9503 starter and Flaming River steering shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended crossmember\u003c\/td\u003e\n\u003ctd\u003eStifflers transmission crossmember\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGround clearance\u003c\/td\u003e\n\u003ctd\u003eAffected by engine mounting position and lowering; mount shims may be required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eAre these for a stock-cylinder-head 351?\u003c\/h3\u003e\u003cp\u003eThe required head pattern is 3-inch inline at stock port height, with the specified aftermarket heads. Match the head model and bolt spacing before choosing 10252450.\u003c\/p\u003e\u003ch3\u003eWhat chassis parts are required?\u003c\/h3\u003e\u003cp\u003ePlan for the UPR or BMR Standard tubular K-member, Powermaster 9503 starter and Flaming River steering shaft, purchased separately. The Stifflers crossmember is recommended.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e10252450: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to 10252450.\u003c\/p\u003e\u003ch2\u003eOrdering and delivery\u003c\/h2\u003e\u003cp\u003eEstimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.\u003c\/p\u003e","vendor":"Kooks","product_type":"Exhaust Headers","created_at":"2026-10-08T10:40:49+01:00","handle":"kooks-10252450","updated_at":"2026-10-11T03:55:04+01:00","published_at":"2026-10-09T13:45:43+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, fits:mercury-capri, make:ford, make:mercury, type:exhaust-header","variants":[{"id":55646888558934,"product_id":11350203007318,"title":"Default Title","price":"1496.77","sku":"10252450","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:40:49+01:00","updated_at":"2026-10-11T03:55:04+01:00","taxable":true,"barcode":"842422119447","grams":16329,"image_id":null,"weight":16.329,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]}],"options":[{"id":14512383066454,"product_id":11350203007318,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449172971862,"product_id":11350203007318,"position":1,"created_at":"2026-10-08T10:40:49+01:00","updated_at":"2026-10-08T10:40:52+01:00","alt":"Kooks 1-7\/8\" x 3-1\/2\" Stainless Headers. 3\" Inline Bolt Pattern. 351 SBF. 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