Proform - 66826
Header Bolt - Locking - 8 mm x 1.50 Thread - 1.181 in Long - Hex Head - Steel - Nickel Plated - Set of 16
Fits GM LS Engines with 3/8" Wide Flange
Each PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. Its an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.
Length: 1.181 inch
Diameter: 8mm
Feature/Benefit: Wedge-Locking Technology Eliminates Constantly Re-Tightening Exhaust Collector Bolts; Blocks Bolt-Loosening Rotation caused by Vehicle Vibrations.
Applications: Fits GM LS Engines with 3/8-inch Wide Flange
Category: Header Bolts
Color: Nickel Plated
Finish: Nickel Plated
Material: Steel
Part Type: Header Bolts
[{"BaseVehicleId":3051,"EngineBaseId":62},{"BaseVehicleId":3085,"EngineBaseId":62},{"BaseVehicleId":3109,"EngineBaseId":417},{"BaseVehicleId":3231,"EngineBaseId":417},{"BaseVehicleId":31076,"EngineBaseId":62},{"BaseVehicleId":31077,"EngineBaseId":62},{"BaseVehicleId":31080,"EngineBaseId":62},{"BaseVehicleId":31084,"EngineBaseId":62},{"BaseVehicleId":3251,"EngineBaseId":62},{"BaseVehicleId":3256,"EngineBaseId":62},{"BaseVehicleId":3261,"EngineBaseId":62},{"BaseVehicleId":3430,"EngineBaseId":62},{"BaseVehicleId":3462,"EngineBaseId":62},{"BaseVehicleId":3692,"EngineBaseId":453},{"BaseVehicleId":3692,"EngineBaseId":2059},{"BaseVehicleId":3700,"EngineBaseId":62},{"BaseVehicleId":3700,"EngineBaseId":396},{"BaseVehicleId":3700,"EngineBaseId":2059},{"BaseVehicleId":3718,"EngineBaseId":62},{"BaseVehicleId":3718,"EngineBaseId":2059},{"BaseVehicleId":3722,"EngineBaseId":396},{"BaseVehicleId":3731,"EngineBaseId":62},{"BaseVehicleId":3731,"EngineBaseId":453},{"BaseVehicleId":3731,"EngineBaseId":2059},{"BaseVehicleId":28938,"EngineBaseId":62},{"BaseVehicleId":28956,"EngineBaseId":62},{"BaseVehicleId":149821,"EngineBaseId":62},{"BaseVehicleId":30026,"EngineBaseId":396},{"BaseVehicleId":30026,"EngineBaseId":453},{"BaseVehicleId":30026,"EngineBaseId":2059},{"BaseVehicleId":30026,"EngineBaseId":5920},{"BaseVehicleId":30027,"EngineBaseId":396},{"BaseVehicleId":30027,"EngineBaseId":453},{"BaseVehicleId":30027,"EngineBaseId":2059},{"BaseVehicleId":30027,"EngineBaseId":5920},{"BaseVehicleId":30028,"EngineBaseId":396},{"BaseVehicleId":30132,"EngineBaseId":2059},{"BaseVehicleId":31171,"EngineBaseId":453},{"BaseVehicleId":31171,"EngineBaseId":2059},{"BaseVehicleId":31172,"EngineBaseId":396},{"BaseVehicleId":118704,"EngineBaseId":396},{"BaseVehicleId":127051,"EngineBaseId":396},{"BaseVehicleId":138250,"EngineBaseId":2059},{"BaseVehicleId":140522,"EngineBaseId":396},{"BaseVehicleId":141048,"EngineBaseId":2059},{"BaseVehicleId":141052,"EngineBaseId":396},{"BaseVehicleId":141052,"EngineBaseId":2059},{"BaseVehicleId":29995,"EngineBaseId":2075},{"BaseVehicleId":29995,"EngineBaseId":5920},{"BaseVehicleId":30004,"EngineBaseId":396},{"BaseVehicleId":30005,"EngineBaseId":396},{"BaseVehicleId":30019,"EngineBaseId":396},{"BaseVehicleId":30019,"EngineBaseId":2059},{"BaseVehicleId":30020,"EngineBaseId":2059},{"BaseVehicleId":30021,"EngineBaseId":2059},{"BaseVehicleId":30022,"EngineBaseId":396},{"BaseVehicleId":30022,"EngineBaseId":453},{"BaseVehicleId":30023,"EngineBaseId":396},{"BaseVehicleId":30023,"EngineBaseId":453},{"BaseVehicleId":30024,"EngineBaseId":396},{"BaseVehicleId":30025,"EngineBaseId":396},{"BaseVehicleId":30025,"EngineBaseId":2059},{"BaseVehicleId":3011,"EngineBaseId":62},{"BaseVehicleId":3019,"EngineBaseId":62},{"BaseVehicleId":3058,"EngineBaseId":62},{"BaseVehicleId":3065,"EngineBaseId":62},{"BaseVehicleId":3092,"EngineBaseId":62},{"BaseVehicleId":3107,"EngineBaseId":417},{"BaseVehicleId":31056,"EngineBaseId":62},{"BaseVehicleId":31057,"EngineBaseId":62},{"BaseVehicleId":31062,"EngineBaseId":62},{"BaseVehicleId":31063,"EngineBaseId":62},{"BaseVehicleId":3229,"EngineBaseId":417},{"BaseVehicleId":3288,"EngineBaseId":62},{"BaseVehicleId":3312,"EngineBaseId":62},{"BaseVehicleId":3337,"EngineBaseId":62},{"BaseVehicleId":3390,"EngineBaseId":62},{"BaseVehicleId":3398,"EngineBaseId":62},{"BaseVehicleId":3437,"EngineBaseId":62},{"BaseVehicleId":3444,"EngineBaseId":62},{"BaseVehicleId":3469,"EngineBaseId":62},{"BaseVehicleId":3618,"EngineBaseId":62},{"BaseVehicleId":3729,"EngineBaseId":62},{"BaseVehicleId":28916,"EngineBaseId":62},{"BaseVehicleId":28936,"EngineBaseId":62},{"BaseVehicleId":3008,"EngineBaseId":62},{"BaseVehicleId":3018,"EngineBaseId":62},{"BaseVehicleId":3049,"EngineBaseId":62},{"BaseVehicleId":3064,"EngineBaseId":62},{"BaseVehicleId":3083,"EngineBaseId":62},{"BaseVehicleId":31048,"EngineBaseId":62},{"BaseVehicleId":31049,"EngineBaseId":62},{"BaseVehicleId":31054,"EngineBaseId":62},{"BaseVehicleId":3106,"EngineBaseId":62},{"BaseVehicleId":31055,"EngineBaseId":62},{"BaseVehicleId":3228,"EngineBaseId":417},{"BaseVehicleId":3266,"EngineBaseId":62},{"BaseVehicleId":3290,"EngineBaseId":62},{"BaseVehicleId":3314,"EngineBaseId":62},{"BaseVehicleId":3383,"EngineBaseId":62},{"BaseVehicleId":3397,"EngineBaseId":62},{"BaseVehicleId":3428,"EngineBaseId":62},{"BaseVehicleId":3443,"EngineBaseId":62},{"BaseVehicleId":3460,"EngineBaseId":62},{"BaseVehicleId":3617,"EngineBaseId":62},{"BaseVehicleId":3728,"EngineBaseId":62},{"BaseVehicleId":130907,"EngineBaseId":62},{"BaseVehicleId":3012,"EngineBaseId":62},{"BaseVehicleId":28935,"EngineBaseId":62},{"BaseVehicleId":3020,"EngineBaseId":62},{"BaseVehicleId":3050,"EngineBaseId":62},{"BaseVehicleId":3066,"EngineBaseId":62},{"BaseVehicleId":3084,"EngineBaseId":62},{"BaseVehicleId":3108,"EngineBaseId":417},{"BaseVehicleId":31064,"EngineBaseId":62},{"BaseVehicleId":31065,"EngineBaseId":62},{"BaseVehicleId":31068,"EngineBaseId":62},{"BaseVehicleId":31072,"EngineBaseId":62},{"BaseVehicleId":3230,"EngineBaseId":417},{"BaseVehicleId":31073,"EngineBaseId":62},{"BaseVehicleId":3250,"EngineBaseId":62},{"BaseVehicleId":3255,"EngineBaseId":62},{"BaseVehicleId":3260,"EngineBaseId":62},{"BaseVehicleId":3391,"EngineBaseId":62},{"BaseVehicleId":3399,"EngineBaseId":62},{"BaseVehicleId":3429,"EngineBaseId":62},{"BaseVehicleId":3445,"EngineBaseId":62},{"BaseVehicleId":3461,"EngineBaseId":62},{"BaseVehicleId":3619,"EngineBaseId":62},{"BaseVehicleId":3691,"EngineBaseId":453},{"BaseVehicleId":3691,"EngineBaseId":2059},{"BaseVehicleId":3699,"EngineBaseId":396},{"BaseVehicleId":3699,"EngineBaseId":2059},{"BaseVehicleId":3730,"EngineBaseId":62},{"BaseVehicleId":28937,"EngineBaseId":62},{"BaseVehicleId":28955,"EngineBaseId":62}]
