Maximize gear life and performance with the strongest support covers you can buy!    
  checkmark High tensile aluminum alloy    
  checkmark Eliminates case distortion    
  checkmark Controls unwanted gear deflection    
  checkmark Provides additional clearance
for low gear ratios
   
  checkmark Allows aftermarket main caps
and main cap stud kit installation
   
  checkmark Increases fluid capacity    
  checkmark Reduces operating temperatures    
  checkmark Convenient fill port & magnetic drain plug    
  checkmark Correct mounting fasteners included    
  checkmark Step-by-step instructions for a simple
bolt-on installation
   
       
 
Chevy, Buick, Oldsmobile and Pontiac Support Cover, Differential cover, Rear End Girdle Applications
  checkmark NEW! available in PRO-SERIES: durable black powder-coated finish  
Support Cover, Differential cover, Rear End Girdle, GM 301-7.5G Support Cover, Differential cover, Rear End Girdle, GM 311-7.5G Support Cover, Differential cover, Rear End Girdle, GM 301-10 Support Cover, Differential cover, Rear End Girdle, GM 311-10
1977-'05 GM 1977-'05 GM 1964-'06 GM 1964-'06 GM
10 bolt (7.5 & 7.625) 10 bolt (7.5 & 7.625) 10 bolt (8.2, 8.5 & 8.6) 10 bolt (8.2, 8.5 & 8.6)
  PRO SERIES   PRO SERIES
$169.99 $199.99 $169.99 $199.99
301-7.5G 311-7.5G 301-10* 311-10*
Support Cover, Differential cover, Rear End Girdle, GM 301-12 Support Cover, Differential cover, Rear End Girdle, GM 311-7.5F Support Cover, Differential cover, Rear End Girdle, GM 301-12x Support Cover, Differential cover, Rear End Girdle, GM 311-12x
1965-Present GM 1965-Present GM 1982-'02 F-BODY GM 1982-'02 F-BODY GM
12 bolt (8.875 car) 12 bolt (8.875 car) 12 bolt (low profile) 12 bolt (low profile)
  PRO SERIES   PRO SERIES
$169.99 $199.99 $186.99 $216.99
301-12 311-12 301-12X 311-12X
Support Cover, Differential cover, Rear End Girdle, GM 301-12T Support Cover, Differential cover, Rear End Girdle, GM 311-12T Support Cover, Differential cover, Rear End Girdle, GM 301-14 Support Cover, Differential cover, Rear End Girdle, GM 311-14
1964-'82 GM 1964-'82 GM 1973-Present GM
1973-Present GM
12 bolt (8.875 truck) 12 bolt (8.875 truck) 14 bolt (10.5 Corporate) 14 bolt (10.5 Corporate)
  PRO SERIES   PRO SERIES
$169.99 $199.99 $189.99 $219.99
301-12T 311-12T 301-14* 311-14*
Support Cover, Differential cover, Rear End Girdle, Oldsmobile 301-12O Support Cover, Differential cover, Rear End Girdle, Oldsmobile 311-12O Support Cover, Differential cover, Rear End Girdle, Buick, Oldsmobile, Pontiac 301-8.8 Support Cover, Differential cover, Rear End Girdle, Buick, Oldsmobile, Pontiac 311-8.8
1968-'70 OLDS 1968-'70 OLDS 1964-'71 1964-'71
12 bolt 12 bolt BUICK/OLDS/PONT BUICK/OLDS/PONT
(8.5, 10 bolt ring gear) (8.5, 10 bolt ring gear) 10 bolt (8.2) 10 bolt (8.2)
  PRO SERIES   PRO SERIES
$186.99 $216.99 $169.99 $199.99
301-12O 311-12O 301-10B 311-10B
Support Cover, Differential cover, Rear End Girdle, GM 301-14G Support Cover, Differential cover, Rear End Girdle, GM 311-14G Support Cover, Differential cover, Rear End Girdle, DANA 301-44 Support Cover, Differential cover, Rear End Girdle, DANA 311-44
1981-Present GM 1981-Present GM 2001-Present GM 2001-Present GM
14 bolt 14 bolt 14 bolt 14 bolt
(9.5 Semi-Floating) (9.5 Semi-Floating) (11.5 AAM) (11.5 AAM)
  PRO SERIES   PRO SERIES
$186.99 $216.99 $209.99 $239.99
301-14G 311-14G 301-14A 311-14A
Support Cover, Differential cover, Rear End Girdle, DANA 301-60 Support Cover, Differential cover, Rear End Girdle, DANA 311-60 Support Cover, Differential cover, Rear End Girdle, DANA 301-60 Support Cover, Differential cover, Rear End Girdle, DANA 311-60
1966-Present
DANA 60
1966-Present
DANA 60
1958-Present
DANA 70
1958-Present
DANA 70
       
  PRO SERIES   PRO SERIES
$176.99 $206.99 $186.99 216.99
301-60 311-60 301-70 311-70
Support Cover, Differential cover, Rear End Girdle replacement parts ARP Main Cap Stud Kits ARP 12pt Stainless Fasteners

Rear Cover
Replacement Parts

ARP Main Cap
Stud Kits

ARP 12pt Stainless
Fasteners

     
     
Listed on Order Page: Listed on Order Page: Listed on Order Page
ORDER ORDER ORDER
  *also includes metric fasteners