1999 1LE Formula. I just purchased the car and the previous owner(goober) pulled all the 1LE suspension off the car and installed some kyb shocks and struts. He also changed the springs to eibach pro's I think. He said the springs dropped the car around 2''. I found where I can get ahold of the Koni Double adjustables, but I'm not sure what springs were used. Any help with this will be appreciated.

 

I got this off one of these sites years ago, not sure what year this applies (I would assume the LS1 1LE years, '98-'00).

Suspension

26032907 1LE front swaybar (32mm)
10221779 1LE endlinks
10021221 1LE rear swaybar (21mm)
10262147 1LE Panhard bar
22132887 1LE front springs
22132889 1LE rear springs
10221779 1LE endlinks
52367658 1LE Front Left Lower Control Arm
22156461 1LE Front left upper Control Arm
52367659 1LE Front Right Lower Control arm
22156462 1LE Front Right upper Control arm
22132887 1LE front springs
26032907 1LE front swaybar (32mm)
10288551 1LE front swaybar insulator (32mm)
10164151 1LE Lower Control Arms
10262147 1LE Panhard bar
22166910 1LE Rear shock insulator retainer
10009135 1LE Rear shock lower insulator
22166909 1LE Rear shock upper insulator
22132889 1LE rear springs
10021221 1LE rear swaybar (21mm)
10235886 1LE Rear swaybar insulator (21mm)
10413903 Torque Arm Bushing
22174970 Transmission Mount

I'll see if I've got any colaborating information.........please stand by.

 

Here's another list of spring PNs, the 1LE PNs (and WS6 '96-'99) agree w/ the previous list I posted.



Springs information (RPO codes, P/N):

RPO codes (6xx, 7xx, 8xx, 9xx) xx is the spring code and will be two letters.

----------------------------------------
Important Info:

The stock V8s rear springs are used on 98+ V6 models (114 lbs/in).

The 98+ V6s have stiffer front springs (257 lbs/in) than earlier years.

Y87 cars have same springs as non-Y87.
----------------------------------------

Front part # / Rear part #
(RPO #, F/R) Year & Model that uses these springs V6

22077191 / 22077418
(AX, TD) 1995 Firebird (non-Y87) auto convertible
(GM, TB) 1995 Camaro (non-Y87)
(GM, TB) 1996 Firebird (non-Y87) M5
(GM, TB) 1996 Camaro (non-Y87) M5

22133438 / 22077421
(PW, TJ) 1999 Camaro (non-Y87) A4
(PW, TJ) 2000 Camaro (non-Y87) A4

22133436 / 22077421
(PU, TJ) 2000 Camaro (Y87) convertible
(PU, TJ) 2000 Firebird (non-Y87) F41 V8

22077197 / 22077421
(HE, TH) 1994 Trans Am
(HE, TJ) 1995 Trans Am auto

22132887 / 22132889
(ZR, HS) 1998 Camaro Z28 1LE
(ZM, TJ) 2000 Trans Am WS6 FE4
(ZM, TJ) 2000 Trans Am FE2
(ZL, TH) 2000 Formula NHRA FE2

FRONT

22077189
(93-96) Code AT, AV, AS, DN, DR, DX, DY, GJ, GK, GL, GV, GT, HW, HX, HY
(97) Code AA, AB, AD, AJ, AK, AL, GL, HW, HX

22077191 (39 N/mm, 223 lbs/in) (93-97 V6)
(93-96) Code AW, AX, AY, DS, DT, DV, EA, EB, ED, GM, GN, GR, GW, GX, GY
(97) Code AM, AN, AR, GM, GN, GR

22077195
(94) Code BA, BB, BD, BH, BJ, BK, HD, HA, HB
(95-96) Code BA, BB, BD, BH, BJ, BK, HB, HD
(97) Code BA, BB, BD, BH, BJ, BK, HA, HB, HD
(98-99) Code ZK, ZL, ZP

22077197 (51 N/mm, 292 lbs/in) (93-00 V8)
(93-96) Code BE, BL, BG, BM, EK, EL, EY, GA, GG, GH, HE, HG, HL, HM, HT, HV
(97) Code BE, BG, BL, BM, HE, HG
(98) Code ZM, ZN, ZR
(99) Code ZM, ZN

22132887 (63 N/mm, 360 lb/in) (WS6, 1LE)
(94-96) Code BN
(97) Code R8
(98-99) Code NM, DZ, ZR

22133434
(98) Code PR

22133435
(98) Code PS

22133436
(98) Code PT, PR, PS, PU, PW, PZ
(99) Code PR, PS, PT, PU

22133437
(98) Code PU

22133438 (45 N/mm, 257 lbs/in) (98-00 V6)
(98-99) Code PW, PZ

22133439
(98) Code PZ

REAR

22077418 (16.9 N/mm, 95.4 lbs/in) (93-97 V6)
(93) Code TD, TM
(94-97) Code TB, TC, TD, TM

22077421 (19.9 N/mm, 114 lbs/in) (93-00 V8, 98-00 V6)
(93-99) Code TF, TH, TJ, TK

22132562 (old 1LE)
(94-96) Code TP

22132889 (23 to 30 N/mm, 130-170 lbs/in) (WS6, 1LE)
(96-99) Code HS, HR, HT

Thanks to Robert (FirebirdGT) for the information on the springs.

 

So it looks as if they were just WS6 springs

 

Yessir, the WS6 performance package pretty much included all the 1LE suspension components. What makes the parts "1LE/WS6" are slightly harder bushings. The arms are the same. Most of these bushings aren't available anymore.

Are you looking to return this car to totally factory original parts?

Quite honestly, a car with the 1LE or WS6 options only performed marginally better than the stock suspension. The shocks alone are the most substantial upgrade in performance.

Unless you're returning to stock, the aftermarket performance goodies will perform better.

I'm not a fan of big body drops and I'd consider 2 inches excessive. But drops are up to a car's owner.

 

NOTE: The very earliest 1LE front lower control arms had some longer welding on them-not done with later versions.

 

I wasn't sure what the springs were. Thought they may have been 1LE specific. Gonna get the Koni's and look for the right springs. I had firehawk springs on a 2000 which lowered it about an 1''-1.25''. Might go with those. Would like Global West to make a full set of del-a-lum bushings for the car.

 

I've personally felt the 96-99 WS6 cars had the best stance from the factory. My buddy's '99 WS6 Formula looks perfect on the stock springs, IMO:



sorry, that's the best one I have available to me at work