GM Performance Parts


Drew sent me a list of GM performance parts that would fit the Impala.  I went to the GM Performance Parts site and checked each of these items.  I cannot vouch for the prices, but the site says they will fit the Impala.  The link to the GM Performance Parts site is on the Accessories page.

Part number Description Price
12498649 High Performance Tubular Rear Trailing Arm Kit


For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  This kit increases rear suspension performance by eliminating rear suspension flex.  It includes two rear trailing arms.
$31.50
12456148 Strut Braces

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For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  These are production Buick strut tower braces designed to minimize body flex.  The kit includes two strut tower braces, hardware, and installation instructions.

Eric ordered this part and got the standard tower brace that is already installed in the Impalas.
$7.80
12498643 Heavy Duty Front Stabilizer Bar Kit

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For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  This 34mm bar enhances cornering by reducing body roll.  The kit includes stabilizer bar P/N 10404184, bushings P/N 10403188, and end links P/N 10403402.
$45.50
12498642 Heavy Duty Rear Stabilizer Bar Kit

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For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  This 19mm bar enhances cornering by reducing body roll.  The kit includes stabilizer bar P/N 10274610 and bushings P/N 10415925.
$35.00
12498644 High Performance Front Brake Upgrade Kit (Complete)


For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  This kit includes caliper mounting brackets, 12 inch rotors and high performance front brake pads.  This brake package improves driver feel and feedback.

Technical Notes: High Performance Brake Pads generate higher temperatures and can warp rotors if not allowed to sufficiently cool between severe uses.  This brake package will not fit with stock "crosslaced" wheels.  The spare tire may not fit on the front of vehicle with brake upgrade.  Monte Carlo and Impala may have this brake package installed stock.

This kit includes the following items listed by part number quantity and description:
P/N 18046666 - 2 - Pin kit, front brake caliper guide
P/N 18024959 - 2 - Bushing kit, front brake caliper
P/N 18029829 - 2 - Bracket, front brake caliper
P/N 18060640 - 2 - Rotor, front brake
P/N 18029828 - 1 - Pad kit, front disc brake
$255.50
12498617 Catalyst back Exhaust System


For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  This replacement exhaust system is constructed with 409 stainless steel tubing and 304 polished stainless steel muffler and tips.  Four inch tips exit under the rear bumper and have adjustable depth to accommodate both stock bumper and "ground effects" kits.  Exhaust adds a "throaty" rumble while still maintaining a palatable interior noise level.
$419.30
12498653 Bracket kit for Catalyst back Exhaust System

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Since the stock Impala has only one muffler, you will need this kit to hang the second muffler.  It includes a mounting bracket, two hangers, and two bolts.  According to Matt, who installed the system on his car and provided this info, you should get two 3/8 inch self tapping bolts and use those instead of the ones that come in this kit.  He says that the mufflers, resonator, and tips were nicely polished and everything fit together well.
$19.50
12498354 Adjustable Strut/Lowering Spring Package

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For use on 1999 - 2002 Chevrolet Monte Carlo; 2000 - 2002 Chevrolet Impala; 1997 - 2002 Pontiac Grand Prix.  These lowering springs reduce the front ride height by .9 inches and rear ride height by .7 inches.  Higher rate coil springs add to cornering ability and complement the adjustable struts.  Struts accommodate compression/rebound adjustment easily from underhood (front) or in trunk (rear) with included adjuster knob.  Adjustments can be made from a "firm" setting allowing maximum cornering to a "soft" setting approaching the ride quality of "stock" components.

Technical Notes: Not Recommended for vehicles carrying high occupant or cargo loads or tow vehicles. Kit includes two front and two rear assembled strut assemblies.

This kit includes the following items listed by part number quantity and description:
P/N 11516382 - 4 - Nut, front suspension strut
P/N 22152030 - 2 - Washer, front suspension strut
P/N 22179011 - 2 - Mount assembly, front suspension strut
P/N 22167000 - 2 - Retainer, front suspension strut mount
P/N 00908554 - 2 - Bearing assembly, front suspension mount
P/N 22166979 - 2 - Seat, front spring
P/N 22181807 - 2 - Insulator, front upper spring
P/N 22166978 - 4 - Shield, front suspension strut
P/N 22166890 - 4 - Cup, rate front suspension shock
P/N 22181835 - 2 - Insulator, front lower spring
P/N 10283611 - 2 - Washer-rear suspension strut mount
P/N 10445033 - 1 - Mount assembly rear suspension strut
P/N 10445032 - 1 - Mount assembly rear suspension strut
P/N 10286793 - 2 - Insulator, rear lower spring
$889.00
12498521 GMPP Performance Front Strut Service Part

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This service part is used for the front strut on the adjustable strut and lowering spring package P/N 12498354.  Parts include a front strut, plastic washer, and adjuster knob.
$238.27
12498522 GMPP Performance Rear Strut Service Part

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This service part is used for the rear strut on the adjustable strut and lowering spring package P/N 12498354.  It includes a rear strut, plastic washer, and adjuster knob.
$238.27