JEGS Super Heavy Duty Flexplates are SFI 29.1 approved for drag racing and made in the USA. The 0.160" thick plates are CNC machined from 4130 chromemoly steel. The 1045 Steel ring gear is heli-arc fixture welded for precision. Weighs approx. 2 lbs. more than stock for more inertia on launch to improve reaction and 60' times. Final assembly is zinc dichromate plated for a long lasting appearance and to help ward off any degradation from the elements. A final 100% inspection is performed before any flexplate is placed in the packaging to assure total customer satisfaction. Made in USA.