What is GM part number 12551483?
Are these Lt1 heads? If so what year?
Thanx Jason

 

DESCRIPTION: VALVE SPRING
This single valve spring is use on 1996 LT4 Production Corvettes and ZZ4 crate engines. Technical Notes: Single spring with 1.32" O.D. and 1.22" solid height. The pressure at installed height IS 101# @ 1.78" with 332# the average rate of pounds per inch. Use with retainer P/N 10168424.

 

That would be one spring of the LT4 spring set, which is GM p/n:

LT4 Valve Spring Kit 12495494 [16/ 12551483's]

Also that p/n given for a retainer is an LT1 retainer [one] the LT4 retainer set is:
LT4 SB Chevy Valve Spring Cap Kit 12495492 [16/ 10212808's]

 

You guys rock. Where do you go to decode part numbers?

Thanx again, Jason

 

I just plugged in your part # at http://gmpartsdirect.com/ , but I have a lot of part numbers listed on my site.

 

thanks again, shoebox



Jason