Flexplates & Block Plates

5 products

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Coyote Block Plate.

4536009

$66.00
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GM 8 bolt SFI flexplate for Gen V LT engines, LSA, and LSX

047-0230

$671.00
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Small Block Ford Block Plate

4536016

$66.00
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GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines

$671.00
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QUICKTIME-RM-525 400 Balance Plate

QUICKTIME-RM-525

$33.00

Coyote Block Plate.

4536009

$66.00 Save $-66.00
Fits 4.6L, 5.4L and 5.0L Coyote Motors. Has cut out for Coyote Sensor. Break away lower converter access cover. Coyote Block Plate 4.6L, 5.4L & 5.0L Coyote Steel Block Plate
Coyote Block Plate.

GM 8 bolt SFI flexplate for Gen V LT engines, LSA, and LSX

047-0230

$671.00 Save $-671.00

If you're looking for the highest quality flexplate on the market today check out this new 1 piece design from Boninfante.  Designed to work with the new GM Gen V LT1, LT4, LT5 engines as well as the previous 8 bolt crank LSA and LSX engines.  This 168 tooth flexplate is  drilled for multiple converter patterns and it will allow you to mate up to the GM 4L80/85E, 6L80/6L90E, 8L90E, 10L80/90E transmissions.

Features:

• One-piece design with integral ring gear
• Specially selected aerospace grade alloy steel from USA steel mills
• Proprietary 3-stage heat treating process
• Hard machined to exacting tolerances (.002 TIR)
• Boninfante’s proprietary stress proofing and finishing process
• Finished in a beautiful black oxide
• Tested to 20,000 RPM which exceeds SFI safety standard 29.2

This is the ONLY SFI rated flexplate available today for the new GM 10 speed automatic!

GM 8 bolt SFI flexplate for Gen V LT engines, LSA, and LSX

Small Block Ford Block Plate

4536016

$66.00 Save $-66.00

Steel block plate for small block Ford with automatic transmission. Has dual starter cut-out and break-away lower converter access cover.

Small Block Ford Block Plate

GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines

$671.00 Save $-671.00

If you're looking for the highest quality flexplate on the market today check out this new 1 piece design from Boninfante.  Designed to work with GM Gen 3 & 4 LS engines with the 6 bolt crank flange.  This 168 tooth flexplate is  drilled for multiple converter patterns and it will allow you to mate up to the GM LS 4L65E(11.063" bolt circle), 4L80/85E, & 6L80/6L90E transmissions.

Features:

• One-piece design with integral ring gear
• Specially selected aerospace grade alloy steel from USA steel mills
• Proprietary 3-stage heat treating process
• Hard machined to exacting tolerances (.002 TIR)
• Boninfante’s proprietary stress proofing and finishing process
• Finished in a beautiful black oxide
• Tested to 20,000 RPM which exceeds SFI safety standard 29.2


GM 6 bolt SFI flexplate for Gen 3 & 4 LS engines

QUICKTIME-RM-525 400 Balance Plate

QUICKTIME-RM-525

$33.00 Save $-33.00
QUICKTIME-RM-525 400 Balance Plate/offset
  • Made from quality H-60 steel
  • Use with 350 Flexplate for external balanced 383 or 400 engines
  • Offset for OEM Flexplate to crank clearance
  • Zinc plated
  • Stamped "Engine side"
QUICKTIME-RM-525 400 Balance Plate