ARP 2442902 Pro Series Flexplate Bolt Kit for GM LS Engines with Adapter Plate

The ARP 244-2902 Pro Series Flexplate Bolt Kit provides superior strength and reliability for GM LS Series engine flexplate installations when using a crankshaft spacer adapter plate. These premium bolts are engineered specifically for Gen III/IV LS engines paired with early GM transmissions including TH350, TH400, 700R4, and 4L80E conversions that require an adapter plate.

Key Features:

• Forged from 8740 chromoly steel aerospace alloy with 200,000 PSI tensile strength
• Heat-treated prior to precision thread rolling for maximum fatigue resistance
• Exclusive flat 12-point head design for positive engagement
• Centerless ground bearing surface ensures perpendicular thread alignment and equal load distribution
• Larger-than-stock underhead radius for increased strength
• Black oxide finish for corrosion resistance
• 11mm x 1.5 thread size with 1.075 inch under-head length

What's Included:

• Six (6) Pro Series flexplate bolts
• 1/2 oz. pack of ARP Ultra-Torque fastener assembly lubricant

This kit is designed to replace GM Performance part number 19257940 and should be used with GM Performance crankshaft spacer kit 12021399. Torque specification is 85 ft-lbs using supplied lubricant. Note: Do not use washers with these bolts—they are engineered to be installed without washers.