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which is the better of the two? and is there a big difference in the prices?

 
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if you are talking about springs...i used to have progress..and they SUCK! i have a sedan..so the back saged...the ride really really sucked~! i mean...i know when u lower your car..u are going to have a crapy ride..but dang...progress was just crap...i'm getting neuspeed sport soon..i hope it works better then progress....^^;;

 
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I have progress springs on my coupe and i like them a lot i noticed some bouncing but not all crazy...in the sagging part in the rear i have a little but i also have 2 12" subs and a heavy box..when i take the subs out i have no sag at all...i give progress springs a

 
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i 2nd kraize's praise of progress. i have coupe and when i had my sub box it was barely lower than the front. and now i don;t have my boom anymore...it looks perfect. check my ride section to see the drop with my box in. ride quality is better IMO. ive ridden in both.

 
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I have eibach and my car feel stock ride wise, but it corners like a race car !! ,

if you can afford it get the good stuff - something i've learned

good luck !

 
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the car sags and the ride sucks because ur shocks are wearing out. if u have performance shocks that are made to take the abuse then u will have no sag and the ride would be more bearable than it is now.

 
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You guys that bash Progress must be riding on stock shocks....not cool. Progress and Eibach both make awesome suspension equipment. I woul persoanlly take Progress of Eibach.