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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5
On-Head Rocker Arm Mount Style
Also Includes Electronic Control Unit Box
One Measures 0 to 1 Inch Range In
All settings are easily controlled with two buttons
such as rocker or cylinder head studs
Wedge-Locking Header Bolts Hex Head M8 X .984 Inch Chevy LS Nickel Plt 12 Pcs Proform Engine Valve Cover Hold Down Tab On-Head Rocker Arm Mount StyleEach 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
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