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Decode VBP Label on Composite Spring

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Old Oct 7, 2012 | 10:08 AM
  #1  
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Default Decode VBP Label on Composite Spring

The VBP help desk email does not permit attaching pictures so I thought I would ask the CF folks and our premium sponsor here on the CF.
I purchased a composite spring from a VBP reseller to replace the steel spring that was sagging on one side and thought that I had received a 360# spring. I've been driving with it for 5 years. I was working on the car and noticed the product label as well as a paint mark that reads "K337." I can't tell from the product label (note holes punched) if this is a 330# (hole punched above) or a 360# (hole punched through) spring. The K337 marking sounds a little too close to 330 to be coincidence. Any feedback from the CF or VBP would be appreciated. Thanks.
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Old Oct 7, 2012 | 11:44 AM
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Call VBP and ask. Looks to me like you have a 360lb spring, based on the punch mark.

After five years, does it matter?

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Old Oct 7, 2012 | 03:00 PM
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Default 330# vs 360#

I posted on this, their forum, so they could see their label. I don't understand the "what difference does it make after 5 years" question unless there is some mechanism where 330# springs and 360# springs eventually all become 345# springs after 5 years. Since I have 550# springs on the front I thought I purchased a #360 composite replacement for the rear. I would like to verify what is actually on the vehicle. Call it a "I am a fussy Corvette owner" thing.
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Old Oct 7, 2012 | 04:51 PM
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looks like mine -> 360

I run 550 front as well, Bilsteins all around and have a Sharkbar. The addition of the Sharkbar really stiffened things up.
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Old Oct 8, 2012 | 11:26 AM
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Default Mystery Solved

Originally Posted by 7T3C3TTZ07
The punch holes in the spring label are apparently secondary to the white paint marker K=337 written at the center point. The label above is a 330# spring evaluated to be 337#. This may explain some of the characteristics of this vehicle as compared with my 1970. Now, what to do, move up to 360# in the rear or down to 460# in the front? Oh what the heck, I've been looking for an excuse to try out the VBP Rear Dual-Mount Spring anyway. Timed appropriately for the October sale.
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Old Oct 9, 2012 | 12:17 AM
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Originally Posted by 7T3C3TTZ07
The punch holes in the spring label are apparently secondary to the white paint marker K=337 written at the center point. The label above is a 330# spring evaluated to be 337#. This may explain some of the characteristics of this vehicle as compared with my 1970. Now, what to do, move up to 360# in the rear or down to 460# in the front? Oh what the heck, I've been looking for an excuse to try out the VBP Rear Dual-Mount Spring anyway. Timed appropriately for the October sale.
Why not just call them? The 337 Number is probably a Production Number, if You tell them 337 they can probably tell You the date your 360 lb spring was made and tested.
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