Join Date: Nov 2008
Location: Beautiful Chester County, PA
You also have a (used cost effective) option in the 70-81 F-body front bar along with some GM Bushing options. I run this bar on the front and there is more info in the Impala SS FAQ and here is a CnPaste from that document....
Q: Can I reduce body-roll on the Impala some how?
A: The stock anti-roll bars for the Chevy B-bodies are all the same at 30mm front, 26mm rear, both solid. Those are standard on the Impala and 9C1, and are optional on the Caprice with the B4U suspension required with an LT1.
Herb Adams makes larger front and rear anti-sway bars: front bar is 33mm (vs. 30mm stock) and rear bar is 38mm (vs. 26mm stock). The front bar is attached to the stock control arm hole via solid tierod ends, and has absolutely no rubber or even urethane bushings, so its effect is immediate. The tierods have grease fittings, which allows them to be lubed along with the steerign linkage so there is no noise or wear. The front bars are attached to the vehicle frame via 36mm factory rubber bushings with fiberglass linings as used on '85-'92 F-cars. These bushings are very stiff and do not squeak, unlike aftermarket urethane ones. The rear bar attaches to the lower control arms using longer grade 8 stainless steel bolts in the stock control arm brackets. You can get the rear bar from Summit racing (216-630-0200) under the Herb Adams/Moroso name, part number MOR-86516 ('77-up B-car, cost $119). Call Herb Adams at (408)-649-8423 and ask them for the '77-up B-car front bar with tie-rod ends. See the installation instructions in the technical archives.
Hotchkis Performance recently introduced a custom set of sway bars for the Impala SS. The bars are lighter than stock: a hollow 1 7/16" front and a 1 1/4" solid rear contoured to the rear end. They have fluted polyurethane bushings with grease fittings, plated heavy duty brackets, polyurethane end links with heavy duty hardware, ultra smooth sway bar finish with gloss black powdercoating and they come complete ready to bolt on. As for performance, Hotchkis claims 7.8 mph faster through the 600' slalom test, crisp turn in, balanced handling and excellent ride comfort while cruising. They are available for around $450 or less through NAISSO.
Also note that a second generation F-body sway bar will work on the front of an Impala. The bar is from the 71-81 F-body, and is primarily fitted to Trans Ams and Z-28's. It is 1 1/4 in. (32 mm) in dia. and 35% stiffer than the stock SS bar. It is avialable in 2 ways: from GM as p/n 356534 (most common price quoted locally was $94.12), or from the local junkyard for $20-40. The best sources at the seem to be the '78 and '79 TA's and Z-28's. You won't need the end links or bushings, just the bar. The stock end links work very well. You'll need bar bushings, (2 are required) (Old PN 26039956, New PN 10288551), Sway Bar (PN 356534), Bolts (4) (PN 15959689), and End bushings (8) (PN 10221801).
Another (even cheaper) upgrade is to replace the factory Impala bushings with the much better urethane bushings from a 4th gen. F-car. These are available under p/n 10221801 and cost a whopping $0.68 each, for a total of $5.44 for all 8 that you will need. These have a specially designed recessed cup that retains the large washer and does not allow the bushing to skew sideways or become cocked like the factory bushings. The urethane material also seems to be of a higher grade. Aftermarket bushing kits are also available. This is a good "bang for the buck" mod for any Impala: the stock Impala bushings are very weak.
Another tip is to Replace the rubber frame bushings with GM p/n 26039956 (newer part # is 10288551: current F-body hardware) or aftermarket urethane bushings for 1 1/4 in. sway bars. The GM parts have a fiberglass liner that prevents noise and wear. If you use aftermarket urethane bushings, lube them with 3M Silicone Paste. Do not reuse the "prevailing torque" bolts that hold the front bushings to the frame. Use GM p/n 15959689 (4 needed @ $.42 ea.) as a replacement. The original bolts are likely to strip the threads in the frame if reused.
Back to the index...
'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.