{"product_id":"mangum-racing-brodix-273cc-ls7-cylinder-heads","title":"Mangum Racing Brodix 273cc LS7 Cylinder Heads","description":"\u003cp\u003eBased on the race-proven Brodix LS7 casting, this Mangum Racing 273cc program is built for large-displacement, high-rpm LS7 combinations. Full CNC machining, a 12° valve angle, OEM LS7 valve spacing, and a 6-bolt deck deliver airflow and structural strength for demanding naturally aspirated or boosted applications.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6-bolt Brodix LS7 casting with stock valve lengths and OEM LS7 valve spacing\u003c\/li\u003e\n\u003cli\u003e273cc CNC intake ports, 93cc exhaust ports, and 70.5cc CNC combustion chambers\u003c\/li\u003e\n\u003cli\u003e2.200\" titanium intake valves and 1.610\" stainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eBronze guides, PAC .660\" dual springs, titanium retainers, Viton seals, and 1.250\" steel spring seats\u003c\/li\u003e\n\u003cli\u003eChamber softening and flat milling at .006\" per cc available\u003c\/li\u003e\n\u003cli\u003eMinimum bore: 4.100\"\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAirflow Performance\u003c\/h3\u003e\u003cp\u003eSuperFlow 1020 data with a 4.125\" bore plate; intake uses a radius entry and exhaust is tested without a pipe.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eValve Lift\u003c\/th\u003e\n\u003cth\u003e.200\u003c\/th\u003e\n\u003cth\u003e.300\u003c\/th\u003e\n\u003cth\u003e.400\u003c\/th\u003e\n\u003cth\u003e.500\u003c\/th\u003e\n\u003cth\u003e.600\u003c\/th\u003e\n\u003cth\u003e.700\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eIntake CFM\u003c\/th\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e255\u003c\/td\u003e\n\u003ctd\u003e313\u003c\/td\u003e\n\u003ctd\u003e355\u003c\/td\u003e\n\u003ctd\u003e382\u003c\/td\u003e\n\u003ctd\u003e393\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExhaust CFM\u003c\/th\u003e\n\u003ctd\u003e117\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e209\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eInstallation note:\u003c\/strong\u003e Stock pushrod length works in many combinations, but final length must be verified after camshaft selection and milling.\u003c\/p\u003e","brand":"Mangum Racing","offers":[{"title":"Default Title","offer_id":54111765135679,"sku":"MR-BR273LS7","price":3899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/2041\/6831\/files\/mangum-racing-mr-br273ls7_b24dc54f-d1cc-41a4-8af5-e98066b3c64f.webp?v=1784146884","url":"https:\/\/smgspeed.com\/products\/mangum-racing-brodix-273cc-ls7-cylinder-heads","provider":"SMGspeed","version":"1.0","type":"link"}