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 Cottons Performance Center
 105 Walnut St.
 Agawam, MA 01001
 Ph:  (413) 789-0531
 Fx:  (413) 789-0401
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Home » Buick Grand National » Suspension & Rear End Components

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HR Parts G-Body Swaybar
Product ID: 0450

Details 

 Our new swaybar / Anti-roll system transfers the force from one side to the other, doing a much more efficient job of equalizing the weight to each rear tire.  This in effect almost doubles the traction of a fast car with no air bags, because the passenger tire would have had very little weight on it.  With the added traction and the car being much closer to level, the car can now launch harder and straighter.  This reduces the chance of wandering out of the "groove" and further losing traction, while making it much safer to drive.  Not having to worry about the rear slicks getting cut or damaged from excessive body roll is an added bonus.
Price: $509.00

Rear End Main Cap Stud kit
Product ID: 321-4

Details 

Use these studs with the rear end caps for even more strength and support
Price: $26.00

LPW Brace Kit
Product ID: 341A
LPW Brace Kit
 
Optional brace kit to use with the LPW Ultimate Cover. For the serious racer.....
Price: $113.00

Air-Lift Bags, G-body
Product ID: 60733

Details 

Engineered as add-on helper springs for coil spring suspensions, Air Lift 1000 Drag Bag Air Springs are ideal for the rear coil springs of many cars and some SUVs with light to medium tow/carry capacity.
These springs feature an easy do-it-yourself installation using simple hand tools, and they can be used for load assist or to preload your suspension for drag racing. Each kit is complete with air springs, air lines, fittings, mounting hardware, and a detailed installation manual.
Price: $96.95

Coil-Over Adjustment Tool
Product ID: 7888-110

Details 

Brand:QA1 Precision Products
Product Line:HAL Coil-Over Shock Adjusting Tools
Part Type:Coil Over Adjustment Tools
Adjustment Tool Material:Steel
Adjustment Tool Finish:Natural
Quantity:Sold as a kit.
Notes:Kit includes two non-adjustable wrenches and a thrust bearing assembly.

Coil Over Adjustment Tool, 2-Spanner Wrenchs, Non-Adjustable, with Thrust Bearings/Washers, Kit

An easy way to adjust your shocks.
These coil-over wrenches fit most coil-over shocks. They offer enough leverage to turn most spring seats, and are small enough to fit in your back pocket.

List Price: $49.95
Price: $49.95

Moser 33 Spline Axle kit
Product ID: ASP-2

Details 

Moser Custom Alloy Axles for 8.5" 10 Bolt GM, 12 Bolt GM, and 8.8" Ford Rears, up to 33 spline, Moser Full Spool, Moser C-Clip Eliminator Kits, Choice of Bolt Circles, and up to 1/2" Studs.

  This kit is for the GN 8.5 housing, comes with a choice of 12mm or 1\2" studs, unless noted we ship with 12mm studs. If you are looking for Moser parts, we are your connection, call for pricing and availability

Price: $630.00

Carrier Bearings
Product ID: BRG1

Details 

These oversized bearings are required for use with the Eaton posi units.
List Price: $39.00
Price: $39.00

Upper Sway Bar, single-link
Product ID: BWOL101
Upper Sway Bar, single-link
 
upper single link sway bar. This is a weld in unit, we have been using in many of the street and strip cars we have built
List Price: $399.00
Price: $379.00

Lower Control Arm, single adjustable
Product ID: BWOL121
Lower Control Arm, single adjustable
 
single adjustable lower control arms, made of chrome moly body with solid sprerical rod end
List Price: $229.00
Price: $210.00

Lower Control Arm, double adjustable
Product ID: BWOL122
Lower Control Arm, double adjustable
 
Double adjustable lower control arms made of chrome moly tube with spherical rod ends, a must for the serious drag racer
List Price: $249.00
Price: $229.00

Upper Spherical Bearings
Product ID: BWOL130
Upper Spherical Bearings
 
upper spherical bearing we use for the upper a-arm to the rear end housing, this will eliminate the rubber bushing.
List Price: $119.00
Price: $119.00

Control Arm Bushing Heat Shield
Product ID: CABHS

Details 

1986-1987 Turbo Regal - This will fit G-body cars as well

CONTROL ARM BUSHING HEAT SHIELD

This control arm bushing heat shield was designed to shield the area from heat and install easily.
Price: $15.00

Open Differential, stock USED
Product ID: diff1

Details 

This is a stock used 28 spline open differential for the GM 8.5 10 bolt rear-end. It is in good working condition.
Price: $95.00

Pro coil over conversion kit
Product ID: DR2000K

Details 

Designed to do it yourself.
Here's an easy way to convert your stock rear suspension to a coil-over suspension. You get everything you need with these QA1 Pro coil-over systems, from shocks to nuts and bolts, complete installation instructions, and even decals!

List Price: $529.95
Price: $489.95

Double adjustable rear shock
Product ID: DTC1661P

Details 

DTC1661P Double Adjustable – Truly Independent Compression and Rebound Adjustment 576 Valving Options
  • Includes 24 positions of compression adjustment on one knob, and 24 positions of rebound adjustment on the other knob. Each knob is clearly labeled with an
    "R" for rebound or a "C" for compression, as well as plus and minus symbols for ease of adjustment.
  • Easy Bolt-In Installation
  • Deflective Disc Valving – Advanced Shock Technology Increased valving response, control and consistency.
  • On-The-Car Valving Adjustment
    Gone are the days of removing shocks to adjust valving -- simply turn the knob.
  • 5/8” Centerless Ground, Hard Chrome Plated Piston Rod Precision surface, increased durability, eliminates piston rod flex.
  • Machined, Forged Aluminum Body Lightweight, stronger than billet.
  • Bright Anodized Body Unmatched durability, ease of maintenance, show-winning
    appearance.
  • Three Step Sealing System
  • Aerospace material.
  • Exclusively engineered double lip seal with wiper eliminates seal drag and dirt intrusion.
  • 100% Dyno Tested and Serialized Assures consistency in production and performance.
  • Shock Mounting Hardware
  • Bushing material exclusive to QA1 shocks, for both upper and lower mounts. Mounting hardware is zinc or chrome plated for durability and professional appearance.
  • Exclusive nylon race bearings for smooth, bind-free operation. Also available with polyurethane bushings.
  • These shocks are revalveable and rebuildable by QA1 Authorized Service Centers

APPLICATIONS:

Fits 70-88 Monte Carlo, 68-79 Nova, 63-72 Leaf Spring C-1500/C-10 Pickup (1), 69-87 Grand Prix, 64-81 GTO, 64-81 Lemans, 71-77 Ventura

List Price: $299.95
Price: $269.95

Double adjustable front shock
Product ID: DTC1914P

Details 

DTC1914P Double Adjustable – Truly Independent Compression and Rebound Adjustment 576 Valving Options
  • Includes 24 positions of compression adjustment on one knob, and 24 positions of rebound adjustment on the other knob. Each knob is clearly labeled with an
    "R" for rebound or a "C" for compression, as well as plus and minus symbols for ease of adjustment.
  • Easy Bolt-In Installation
  • Deflective Disc Valving – Advanced Shock Technology Increased valving response, control and consistency.
  • On-The-Car Valving Adjustment
    Gone are the days of removing shocks to adjust valving -- simply turn the knob.
  • 5/8” Centerless Ground, Hard Chrome Plated Piston Rod Precision surface, increased durability, eliminates piston rod flex.
  • Machined, Forged Aluminum Body Lightweight, stronger than billet.
  • Bright Anodized Body Unmatched durability, ease of maintenance, show-winning
    appearance.
  • Three Step Sealing System
  • Aerospace material.
  • Exclusively engineered double lip seal with wiper eliminates seal drag and dirt intrusion.
  • 100% Dyno Tested and Serialized Assures consistency in production and performance.
  • Shock Mounting Hardware
  • Bushing material exclusive to QA1 shocks, for both upper and lower mounts. Mounting hardware is zinc or chrome plated for durability and professional appearance.
  • Exclusive nylon race bearings for smooth, bind-free operation. Also available with polyurethane bushings.
  • These shocks are revalveable and rebuildable by QA1 Authorized Service Centers

Application:

Fits; 73-75 Apollo, 73-87 Regal, 68-79 Skylark, 67-69 Camaro, 68-69 Camaro (Multi Leaf), 68-83 Chevelle, 70-88 Monte Carlo, 68-79 Nova/Chevy II, 82-04 S-10 Pickup 2 WD, 87-99 Dakota Pickup, 68-88 Cutlass 442, 73-79 Omega, 69-87 Grand Prix, 68-74 GTO, 68-81 Lemans,Tempest, 71-77 Ventura.

 

List Price: $289.95
Price: $269.95

Eaton 28 Spline Posi Carrier
Product ID: ETN28
Eaton 28 Spline Posi Carrier
 
Big torque doesn't have to mean big traction problems. Eaton Posi Performance differentials combine carbon friction discs with precision-forged gears to give you great traction, even under higher torque loads. Plus, the carbon friction discs produce smooth, quiet performance for the life of your vehicle. ** WILL REQUIRE OVERSIZED BEARINGS LISTED IN THIS SECTION FOR PROPER INSTALLATION
List Price: $479.00
Price: $479.00

Eaton 30 Spline Posi Carrier
Product ID: ETN30
Eaton 30 Spline Posi Carrier
 
Big torque doesn't have to mean big traction problems. Eaton Posi Performance differentials combine carbon friction discs with precision-forged gears to give you great traction, even under higher torque loads. Plus, the carbon friction discs produce smooth, quiet performance for the life of your vehicle. ** WILL REQUIRE OVERSIZED BEARINGS LISTED IN THIS SECTION FOR PROPER INSTALLATION.
List Price: $479.00
Price: $479.00

Front coil over kit
Product ID: GMP-SERIES-3

Details 

Coil-over performance for stock GM front-ends.
These HAL Pro coil systems are engineered from the ground up, to offer unmatched performance for stock GM front-ends. Pro Coil Systems 1 utilize the Proma Star AL adjustable coil-over shocks and springs, designed specifically for replacing the factory shocks and springs. This combination offers ride height adjustment and 12-position valving adjustment for performance not found in other kits.    **You choose the correct spring for your application

:
List Price: $479.95
Price: $449.95

Ultra-Pro Rear End Cover
Product ID: GRD201-10

Details 

Ultimate and Ultra-Pro heat-treated aluminum covers protect the rear housing against case distortion, preventing increased side-bearing clearance and ring gear deflection
Price: $156.95

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Jack Cotton's 8.90 @ 154MPH 1986 Buick
 T-Type