Ive been researching to find out the full extent of available springs for out cars and the rates. When looking up part#s from comp nine and the for sale section and then checking in parts taxi # checker, this is the information I have compiled.

If other have info to contribute, we may be able to finally get an idea of what really goes where and what springs are the same and which are different... ie: if fe1 and fe2 are supposed to have the same spring rate, then why do they have different #s... same deal with the auto vs manual vehicles as well...

BTW some PNs only show the code for one trans but the labeling on the parts site (with the # plugged in might show the other trans)

FE5 ZR1 and Z06 w/ performace package
--------------------------------------------------
25992251 front w/z06
25992252 rear manual trans perfomance pack


FE4 Z06
--------------------------------------------------
15233395 now 25909895 – Z06 front spring
15233392 – Z06 rear spring


FE3 Base with sport package
--------------------------------------------------
15233396 now 25962573 C5 for some reason
Y(MZ6, FE3) SPRING,FRT(CODE AY)
15233387 now 25962579 manual trans
Y(MZ6, FE3) SPRING,RR

15233400 now 25962574 auto sport susp
Y(MYC, FE3) SPRING,FRT(CODE BA)
15233389 now 25962580 auto trans sport susp
Y(MYC, FE3) SPRING,RR


FE1/FE2 Base/base with ride and handling (f55)
--------------------------------------------------
15233397
Y(MM6, FE1) SPRING,FRT(CODE AX)
15233388
Y(MM6, FE1) SPRING,RR



15233398 manual trans ride and handling
Y(MYC, M32, FE1. mm6 fe2) SPRING,FRT(CODE BC)
15233390 auto soft ride
Y(MYC, FE1) SPRING,RR

15233386 manual trans ride and handling
Y(MM6, FE2) SPRING,RR


15233399 auto trans ride and handling
Y(MYC, FE2) SPRING,FRT(CODE BB)
15233388 manual trans soft ride
Y(MYC, FE2) SPRING,RR


If anyone has access under their car and wants to post the PNs for their stock springs along with the performance options the car was with (ie z51 auto) it will help clear the list up further.

The more we can get this stuff together the easier it will be for people to dial their suspensions in.