★★★★★ 5
Perfect fit
Work great they are ecact
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
COMP Cams Guide Plate GM LS1 5/16 Flat
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
COMP Cams Guide Plate GM LS1 5/16 Flatflat, 1 piece, non adjustableFor 5 16" diameter pushrods and 8mm Rocker StudsFit GM LS engines with "cathedral port" cylinder heads (Ex. LS1, LS6)Designed using stereo lithography Techniques for an accurate fitFeature exact Stud placement and rounded contact pointsNecessary for high lift spring pressure environments of performance enginesHardened and black oxide finished Catalog User 1 This Part Fits: Year Make Model Submodel 2001 2004 Avanti II Base
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- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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