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Ford Racing Catalogue Web

ENGINE COMPONENTS VALVE SPRINGS (SOLD IN PKG. OF 16) a140a141 MINIMUM LOADS – NEW SPRINGS COIL PART NUMBER APPLICATION TYPE ID OD CLOSED OPEN BIND M-6513-A50 289/302/351W Single a142 0.980" 1.470" 123 lbs @ 1.800" 303 lbs @ 1.250" 1.150" with Ford Racing, GT-40 cylinder heads (pkg. of 16) a144a145 M-6513-A351 289/302/351W/460 Dual a143 0.800" 1.460" 135 lbs @ 1.850" 365 lbs @ 1.250" 1.050" M-6513-BH M-6049-Z304DA Single 0.656" 1.055" 130 lbs @ 1.800" 318 lbs @ 1.200" 1.150 Ford Racing Beehive 0.885" 1.290" Cylinder Heads Conical VALVE SPRING NOTES: a140 Valve springs with the same load rating (but with different color-coded stripes) may be packaged together. a141 1977 and later 302 engines have different installed heights for intake and exhaust valves. Valve Spring with Damper a142 With damper. a143 Requires nylon valve stem seal. a144 For use on production heads, see below for valve spring retainer chart and notes. a145 Not recommended with stock rocker arm, may have interference. BOSS 302R VALVE SPRING KIT M-6513-M50BR • Valve spring used on 2012 Mustang BOSS 302 engine • Higher seat pressure than base valve spring • 8000 rpm compatible • Use with cams up to 13 mm lift • Can be used on base 5.0L Ti-VCT head • Solid in sets of 16 VALVE SPRING SEAT (SOLD IN PKG. OF 16) For use with aluminum cylinder heads to prevent damage to valve spring seat area. SEAT DESCRIPTION PART NUMBER CYL IN DER HEAD USAGE SPRING OD OD CUP ID CUP MA TE RI AL THICKNESS M-6536-SCJ M-6049-B429 1.550" 1.680" 0.577" Machined Steel 0.062" M-6536-BH M-6049-Z304DA 1.290" 1.300" 0.880" Machined Steel 0.060" VALVE SPRING RETAINERS (SOLD IN PKG. OF 16 PAIR) APPLICATION SPRING RETAINER STEP DIAMETER PART NUMBER VALVE SPRING DESCRIPTION OD OD 1ST STEP 2ND STEP M-6514-A50 Single lock groove. M-6513-A50 7° Machined 1.500" 1.375" 1.060" 0.675" 11/32" dia. stem. M-6513-B351 Steel M-6049-N351 and all GT-40 a140a141 M-6514-B50 Single lock groove. M-6513-A50 a141 7° Machined 1.500" 1.375" 1.060" 0.675" a140 11/32" dia. stem. Steel M-6514-BH Single lock groove. M-6513-BH 10° Machined 1.055" 1.055" 0.640" N/A 11/32" dia. stem. Steel NOTES:a140Use of M-6514-B50 Retainers on 1979-1995 production valves of 5.0L (302) HO and production GT-40 engines eliminates exhaust rotators and will result in 1.800" intake and exhaust spring “installed height.” a141 With Ford Racing stainless steel valves. VALVE SPRING KEEPERS (SOLD IN ENGINE SET PKG. OF 16 PAIR) PART NUMBER TYPE AND USAGE RECOMMENDATIONS M-6518-B351 Machined and hardened. 7° design with single lock groove. For all-out competition and use with titanium valves M-6518-BH Machined and hardened. 10° design with single lock groove. For use with 10° retainers only! + .050 installed height For important information about the proper usage of performance parts, please see page 14. See pages 286-292 for important safety, emissions and warranty information. www.fordracingparts.com 119


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