TCI® LS1-Style Flexplates are SFI approved, in stock and ready to order.

GM LS1 engines are capable of making big horsepower. However, durability at high RPM can be compromised by an inferior flexplate. In order to prevent this common failure in performance applications, TCI® developed a precision ground, A36 steel material flexplate that is .67? thicker than factory flexplates. The extra thickness will provide years of reliable service, making it a must have for any LS1-style performance application. The ring gear is custom machined to form a perfect I.D. circle before the flexplate is welded in place on both sides. This creates a better, strong fit that prevents runout, ring gear bounce and other damaging problems.

The flexplates are dynamically balanced to eliminate potentially damaging vibrations and electro-coated to protect against damaging elements. The flexplate’s integrated early style dual converter bolt pattern can be used with LS or early style torque converters and TH350/400, Powerglide, 700R4, 2004R and 4L60E/65E/70E transmissions. TCI® LS1-Style Flexplates are the perfect upgrade for anyone running one of these strong, inexpensive and no-electronics-needed transmissions. Fully SFI 29.1 approved, these flexplates offer unmatched strength and reliability in order to avoid cracking and ring gear breakage, which are both common failure points of lesser quality flexplates under the strains of high RPM usage.