Collection: Southwest Speed GM 621 Aluminum Bellhousing

• CHEVY ALUMINUM BELLHOUSINGS TO FIT 11" CLUTCHES. THESE BELLHOUSINGS ARE REPLICAS TO THE GM 3899621.
  
• THIS SOUTHWEST SPEED 11" PERFORMANCE CAST ALUMINUM BELLHOUSING IS A REPRODUCTION OF THE ORIGINAL 3899621 BELLHOUSING USED ON GM MODELS WITH BIG BLOCK & SMALL BLOCK ENGINES EQUIPPED WITH AN 11" CLUTCH. THE 650-3976 BELLHOUSING EVEN HAS THE GM PART # 3899621 CASTING NUMBER STAMPED IN IT. IF YOU ARE DOING A RESTORATION OF AN EARLY MUSCLE CAR, OR JUST WANT THE CORRECT BELLHOUSING TO FINISH THAT ROD PROJECT, THIS BELLHOUSING IS THE PERFECT PART!

FEATURES:

• REPLACES GM PART # 3899621
• CAST ALUMINUM HOUSING
  
• WORKS WITH GM TRANSMISSIONS WITH A 4.675" O.D. BEARING RETAINER
  
• CLEARS 168 TOOTH 14" FLYWHEELS WITH FACTORY 11" CLUTCH DISCS
  
• 1/2"-13 TAPPED HOLE FOR Z-BAR MANUAL CLUTCH LINKAGE, IF NEEDED.
  
• FITS ALL SMALL BLOCK & BIG BLOCK CHEVROLET ENGINES REGARDLESS OF FACTORY CLUTCH SIZE