Product Summary

396, 402, 427, 454, 496, 2-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 2-piece rear main internally balanced 153 tooth flywheel

Comes as a Kit

Key Specs

MFG. Part #91605159
BrandSpeedway Motors

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Speedway Motors 91605159 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


RAM billet steel flywheels are recommended as replacements for factory cast flywheels in high performance and racing vehicles. Cast flywheels are not explosion proof and can be dangerous when used in high performance applications at higher RPMs. RAM billet steel flywheels are CNC machined from certified materials and exceed SFI specifications. After machining, the flywheels are blanchard ground parallel to the crankshaft mounting surface ensuring minimum runout and the optimum mating surface for the clutch disc. Use steel flywheels in heavier drag race cars or for the best driveability in street driven vehicles.

  • Will fit 5 or 6 spring clutch disc hubs
  • Chevrolet 8 cylinder internally balanced  
  • 153 tooth    
  • 12-3/4" diameter        
  • 26 pounds    
  • Accepts 10.5 Borg & Beck and Diaphram-style pressure assembly

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) Ram Clutches 1511 Pre-1986 S/B Chevy Billet Steel Flywheel, 153 Tooth

(1) ARP 200-2802 Chevy Flywheel Bolts

(1) ARP 130-2201 Chevy Pressure Plate Bolts


Speedway Motors 91605159 Specifications

MFG. Part #91605159
BrandSpeedway Motors
Sold in QuantityKit
Rear Main Seal Style2-piece
Engine BalanceInternal
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 MaterialBillet steel
Tooth Count153-tooth
SFI RatingNot SFI-approved
Hardware IncludedYes