Product Summary

396, 402, 427, 454, 496, 1-piece Rear Main Seal Style

  • GM transmission bolt pattern fits Muncie, Saginaw, and Non-World Class T5 transmissions
  • Non-SFI rated bellhousing
  • Stock clutch hydraulic throwout bearing for most stock-style 3-speed and 4-speed Chevy clutches only
  • Stronger, more aggressive clutch than stock. Features a pressure plate with over 1700 lbs of clamping force
  • Chevrolet 8 cylinder 1-piece rear main externally balanced 153 tooth flywheel

Comes as a Kit

Key Specs

MFG. Part #91605158
BrandSpeedway Motors

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Speedway Motors 91605158 Details


We love period-look builds, but when you’re building something that is 50 years old, (or older) sometimes it is best to consider purchasing something new rather than buying an old used part that has seen a million miles, stripped bolt holes, or other damage that might make the part unsafe for use on your project. One such critical area is the manual transmission bellhousing. This part often sees a tough life and some serious wear. Transmission swaps/rebuilds, installing new clutches, and more mean the bellhousing sees a lot of on/off time over the years. This can equate to broken ears, stripped threads, worn clearances that affect transmission/engine alignment, and so much more. This is the very reason why we designed this replacement steel bellhousing for you Chevy enthusiasts running small or big block engines backed by a manual transmission.

Release Bearing

Speedway Motors’ hydraulic release bearing kit provides everything you need to ditch your stock, tired mechanical linkage and go hydraulic at a great value. The kit features a new and improved release bearing designed by Speedway Motors’ Engineering Team with a CNC-machined housing, extended fluid line fittings, and a built-in fail-safe retainer. There is simply no way to over-extend this release bearing with this retainer design. Typically over-extending the release bearing means pulling the transmission and reassembling the separated bearing (not to mention cleaning up all that hydraulic fluid in the bellhousing!). Also included are a sufficient number of release bearing shims to correctly set your air gap between the bearing face and clutch, as well as both 5/16- and 3/8-inch anti-rotation studs to fit a wide variety of GM manual transmission applications.


These new kits feature a pressure plate with over 1700 lbs of clamping force. The clutch disc is unique in that it uses a double spring which is held in place by a unique spring retaining plate design. Clutch comes complete with a pilot bearing, clutch disc, pressure plate and an alignment tool. 

  • Stronger, more agressive clutch than stock
  • Retains stock pedal feel
  • Perfect for mild engines


Don't sacrifice your acceleration due to a heavy flywheel. 

  • Works with 10-1/2" Borg & Beck and diaphragm style pressure assemblies
  • Externally balanced
  • For 1986-up GM 5.0 & 5.7 V-8 with manual transmission applications

Kit Includes

(1) Speedway Chevy Engine to Chevy Transmission Steel Bellhousing

(1) Chevy Hydraulic Throwout Bearing, GM Release Bearing Stock Clutch

(1) 55-79 Chevy/GM Street Series Clutch Kit 10.4 Inch w/1-1/8 In-10 Spline

(1) Small Block Chevy Cast Iron Flywheel, 153 Tooth, 1-Piece Main

(1) ARP 200-2802 Chevy Flywheel Bolts

(1) ARP 130-2201 Chevy Pressure Plate Bolts


Speedway Motors 91605158 Specifications

MFG. Part #91605158
BrandSpeedway Motors
Sold in QuantityKit
Rear Main Seal Style1-piece
Engine BalanceExternal
Input Spline Quantity10
Input Shaft Diameter1.13"
Clutch Diameter10.4
Disc StyleFull face
Hub StyleSprung
Pressure Plate StyleDiaphragm
Throwout Bearing IncludedYes
Alignment Tool IncludedYes
Pilot Bushing IncludedYes
Flywheel IncludedYes
Flywheel MaterialCast Iron
Tooth Count153-tooth
Hardware IncludedYes