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Holley Lower Structure Support for Gen III Hemi Engines and Transmissions

Fits Gen III Hemi Engines and Common Mopar Transmissions. Use with Holley Swap Oil Pans, Fabricated Oil Pans, and Stamped Pans (that do not provide the extra support).

Part # 302-65
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Vehicle emissions regulations are not applicable to this item.

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Most Late-model factory oil pans bolt to the engine block and the transmission for extra strength and support. Most swap oil pans for the Gen III Hemi do not have this additional support, but it can be added using PN # 302-65. This lower support fits cast, fabricated, and stamped swap pans on Gen III Hemi engines with popular transmissions (or bellhousings). The lower structure support also covers the bottom of the transmission (or bellhousing) to keep out dirt and reduce vibration & noise.


  • Lower support bolts engine block to transmission or bellhousing for additional driveline strength and support while keeping dirt and debris out of driveline components
  • Provides OEM style fitment and support on oil pans that do not bolt to the transmission
  • Fits engine swap oil pans: 302-60, 302-61, 5050WND, 5051WND, WB11010, and stamped steel factory oil pans
  • Fits all Gen III Hemi engines – 2003 & Up 5.7, 6.1, 6.2, and 6.4-Liter
  • Fits all common transmissions: TR-6060, NAG1, 545RFE, 8HP70, 8HP90, 9HP75, A727, 46RE, 46RH + More
  • Fits Lakewood bellhousings: LK7000 or LK7000K with Mopar 3-speed, 4-speed, or Tremec TKO/TKX transmissions
  • Covers the lower portion of the bell-housing – to keep dirt out of the bell-housing or transmission
  • Reduces vibration and noise
  • Rigid cast aluminum design with a natural as-cast aluminum finish
  • Bolts on over existing oil pan with included fasteners

About Holley

Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. From start to finish, Holley has the parts to make your dream a reality.

ApplicationGen III Hemi
Brand Holley
Emission Code6
FinishNatural Cast
Product TypeEngine and Transmission Support
Part Number302-65

Vehicle emissions regulations are not applicable to this item.
Lower support is not required with factory oil pans that bolt to the transmission at the rear of the pan. Confirmed Fitment with the following oil pans: Holley PN # 302-60 and 302-61 Weiand PN # 5050WND and 5051WND White Box PN # WB11010 Mopar PN # 4893207AA

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Some parts are not legal for use in California or other states with similar regulations.