Valve springs
Thread Starter
Intermediate
Joined: Jan 2014
Posts: 25
Likes: 2
Valve springs
I know there's a billion post,read almost all,going to replace springs,my 02 z06 has 39k,,,,,better safe than sorry,,,leaning towards pac 1218,,,,then I see pac 1904 kit,dual springs with seals,retainers,keepers for about same price,,,any input on the 1904 spring would be appreciated,,,,,thanks
Thread Starter
Intermediate
Joined: Jan 2014
Posts: 25
Likes: 2
Thanks
I have cai and borla,otherwise stock,so if I go with either of your suggestions I can just replace spring using original seal ,retainer. etc........
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
yes you can reuse everything as long as you use a beehive spring... pac are great springs but duals are overkill with stock cam/valvetrain
Thread Starter
Intermediate
Joined: Jan 2014
Posts: 25
Likes: 2
Burning Brakes
Joined: Feb 2015
Posts: 987
Likes: 224
From: Motor City, MI
PAC makes a nice spring. If you're looking at the 1218 check the 1218x; the x means it's shot peened for longevity (depending on how much you drive it). The GM blue springs are also plenty adequate for a stock cam/push rods/etc.
Racer
Joined: Sep 2012
Posts: 369
Likes: 59
From: North Georgia
I have an 03 Z with the same miles. I went with the GM Blue Springs and Trunion Upgrade. I have pretty much the same mods and track the car a few times a year at Road Atlanta. Just my 2 cents.
Good luck.
Spaggs
Good luck.
Spaggs
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Burning Brakes
Joined: Feb 2015
Posts: 987
Likes: 224
From: Motor City, MI
Melting Slicks
Joined: Nov 2008
Posts: 2,938
Likes: 65
From: Rochester Hills MI
I would definitely go with the PAC 1218's.. These springs are well proven in racing. I got the 1215's for my ls1 when I did the rocker trunnion upgrade (which is something you should consider if you're in there already).