Speedway Motors Motor and Transmission Mount Kit, Fits 1955-57 Chevy V8 Car
Tri-Five Chevy Upgrade: Designed for 1955, 1956, and 1957 Chevy passenger cars to replace factory-style front mounts with stronger side-mount engine support, Wide Engine Compatibility: Allows installation of 1958-up small block Chevy V8 engines from 283 to 400 cubic inches and also works with 396-454 big block engines, Complete Mounting Kit: Includes frame brackets, side engine brackets, rubber mount cushions, hardware, and a bolt-on transmission crossmember, Improved Engine Clearance: Side-mount design provides additional room for front drive accessories and simplifies transmission swaps, Bolt-On Steel Construction: Heavy-duty steel mounts feature a painted black finish with rubber bushings; no welding required for transmission crossmember installation. Speedway 1955-57 Chevy Car V8 Motor and Transmission Mount Kit. On your'55-'57 Chevy car, the front motor mounts are at the front of the block and the rear mount attaches to the bellhousing. This works fine for original use, but makes it hard to swap in a d ifferent tranny or add belt driven accessories to the front of the engine. This mount kit is the solution!
Side-mount motor mounts are a more rugged mount design than the original front mounts found on your Tri-Five Chevy, plus they allow more room for front drive accessories. Our motor mount kit allows you to side-mount 1958-up S/B Chevy 283-400 c. V-8 engines into your 1955, 1956, or 1957 Chevy passenger car.
Will also work on 396-454 big block engines. Rubber mount cushions and hardware. Transmission crossmember no welding required. Mounting a TK500 or TK600 may require risers/spacers to get proper driveline angle.End to end width = 32-7/8. Center to center width (mounting holes) = 3. Drop of top of tube to top of plate = 2-3/4. S-bracket drops the mount surface for teh crossmember 2 down from the top of the frame.
S-bracket is 4" wide- slotted holes for crossmember mounting are 1" to 1-3/4 long. By Mad dog on February 18, 2026.
These parts fit as they should. Yes, I recommend this product. By ShakyJake on November 25, 2025. Motor mounts and trans mounts seem to be made well. By Gareth on July 27, 2025.This kit was so easy to install with easy to follow instructions. Only down side was gearbox mount are not spray but no big issue.
By Gareth on June 26, 2025. Easy to install and easy to follow instructions. Only down side is the gearbox cross member is in painted. By Cam on April 14, 2025.Speedway Motors is America's Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years.