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> Shock and spring refresh, Which to get?
StarBear
post Feb 19 2026, 07:40 PM
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Thinking of doing a refresh of my front shocks and rear shocks/springs. All are very old though function fine. Sure I’ll see improvements in corners and ride.
Thinking of Bilsteins.
Any suggested best choices? (IMG:style_emoticons/default/confused24.gif)
74 1.8L Very stock. (IMG:style_emoticons/default/biggrin.gif)
Just local drives and some hill curves; no track or auto cross.
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L-Jet914
post Feb 19 2026, 09:40 PM
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QUOTE(StarBear @ Feb 19 2026, 05:40 PM) *

Thinking of doing a refresh of my front shocks and rear shocks/springs. All are very old though function fine. Sure I’ll see improvements in corners and ride.
Thinking of Bilsteins.
Any suggested best choices? (IMG:style_emoticons/default/confused24.gif)
74 1.8L Very stock. (IMG:style_emoticons/default/biggrin.gif)
Just local drives and some hill curves; no track or auto cross.


I replaced what was in my 914 with Bilsteins front strut inserts and rear shocks. Or you could go with the AA route where they had shock absorbers made close to the factory spec Boge shock. I decided to go with the 914Rubber rear springs.
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wonkipop
post Feb 19 2026, 11:47 PM
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QUOTE(StarBear @ Feb 19 2026, 07:40 PM) *

Thinking of doing a refresh of my front shocks and rear shocks/springs. All are very old though function fine. Sure I’ll see improvements in corners and ride.
Thinking of Bilsteins.
Any suggested best choices? (IMG:style_emoticons/default/confused24.gif)
74 1.8L Very stock. (IMG:style_emoticons/default/biggrin.gif)
Just local drives and some hill curves; no track or auto cross.


i did the softest spec bilsteins front and rear. they are noticeably firmer.
but i have tall boy XAS reissue tyres to take some of the sting out of them.
not complaining.

inserts at front. full units at rear. what i found was the step rings in the rear shocks do not exactly co-incide with the single spring perch in the original boges. you have to go slightly higher or slightly lower at rear as a result. then level the car out with front adjustment.
i know some folks go lower at front. but i set mine up level.
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sixaddict
post Feb 20 2026, 07:21 AM
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On rear springs…..stock is 90lb which makes car sit a little high. 100lb drops it a little and gives a little better handling without sacrificing ride quality. Several sources but make sure they have inventory. BTW…….Havent installed yet so this is result of extensive search/opinions.
Caveat: this is opinion of poster and does not reflect that of staff or management (IMG:style_emoticons/default/dry.gif)
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JamesM
post Feb 20 2026, 08:29 AM
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QUOTE(sixaddict @ Feb 20 2026, 06:21 AM) *

On rear springs…..stock is 90lb which makes car sit a little high. 100lb drops it a little and gives a little better handling without sacrificing ride quality. Several sources but make sure they have inventory. BTW…….Havent installed yet so this is result of extensive search/opinions.
Caveat: this is opinion of poster and does not reflect that of staff or management (IMG:style_emoticons/default/dry.gif)



Stock is a lot less than 90lbs/in for all the road cars.

According to documentation I have

-4s were 52-55lbs/in depending on part number
-6s were 58-62

6 GTs were 70, 80, or 90 at the stiffest.

So 100s are 10% stiffer than the stiffest spring Porsche ran on GTs.



But for some reason people still throw 225lb springs in the back cuz they are smarter than the Porsche engineers who won LeMans.
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StarBear
post Feb 20 2026, 08:40 AM
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QUOTE(L-Jet914 @ Feb 19 2026, 10:40 PM) *

QUOTE(StarBear @ Feb 19 2026, 05:40 PM) *

Thinking of doing a refresh of my front shocks and rear shocks/springs. All are very old though function fine. Sure I’ll see improvements in corners and ride.
Thinking of Bilsteins.
Any suggested best choices? (IMG:style_emoticons/default/confused24.gif)
74 1.8L Very stock. (IMG:style_emoticons/default/biggrin.gif)
Just local drives and some hill curves; no track or auto cross.


I replaced what was in my 914 with Bilsteins front strut inserts and rear shocks. Or you could go with the AA route where they had shock absorbers made close to the factory spec Boge shock. I decided to go with the 914Rubber rear springs.

@L-Jet914 What spec/model Bilsteins would that be?
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