Are all years of C5 ZO6 springs the same or are there different spring rates for different years? Thanks

Cajun

 

I believe they are all the same through 2004

 

All the same, Here is what I got from Joe at Phoenix. Hope it helps.

Front Springs
Part Number Casting Num Code Rate Years Suspension Useage
22178728 440# 97-02 FE1 w/o F45 All bodies with soft ride susp FE1,(EXC Chasis Realtime Damping F45)
22178729 22171750 AY 525# 98-00 FE3/Z51, FE4/Z06 All bodies with sport suspension Z51/FE3 and Z06 suspension FE4
22178748 457# 99-02 FE1 with F45 Y07-67 Soft ride suspension FE1, Chasis realtime damping F45
12480063 22188479A 582# 97-02 T1 New New style T1 front spring
22188479 582# 97-02 T1 Old Old style T1 front spring

Rear Springs
Part Number Casting Num Code Rate Years Suspension Useage
22179019 577# 98-03 FE1 with MM6 All bodies with 6 speed MM6 and Soft ride suspension FE1
22179020 22171757 RJF 634# 98-00 FE3/Z51 with MM6 All bodies with 6 speed MM6 and Sport suspension Z51/FE3
22146323 588# 98-03 FE1 with M30 All bodies with 4-spd auto trans M30 and Soft ride suspension FE1
22146646 645# 98-03 FE3/F51 with M30 All bodies with 4-spd auto trans M30 and Sport suspension Z51/FE3
22188038 22188078 RJH 714# 01-03 FE4/Z06 with M12 Z06 Hardtop with 6 speed M12 and FE4 Suspension
12480064 22188480 794# 97-02 T1 T1 Rear Spring

Codes Used: FE1 Soft Ride Suspension
FE3 Sport Suspension Z51
FE4 Specail Supension Z06
F45 Chasis Realtime Damping
MM6 6 Speed Transmision - LS1
M12 6 Speed Transmision - Z06
M30 4 Speed Automatic Transmision
Y07 Coupe Body Style
Y37 Hardtop Body Style
Y67 Convertible Body Style

Note: Z06 and Z51 front springs are the same.