BTR Valve Spring Shims are precision-ground spacers used under stock valve guides to fine-tune installed spring height. This listing is the stock-guide variant, a bag of 16 shims at .030 in thickness.
- Part Number: SS030-16
- Application: Stock Valve Guides
- Thickness: .030 in
- Outer Diameter: 1.260 in
- Inner Diameter: .510 in
- Pack Quantity: 16
FAQ
What is the thickness of this shim?
The SS030-16 shim is .030 in thick.
What is the outer and inner diameter?
This is the stock-guide variant: 1.260 in outer diameter, .510 in inner diameter. A larger 1.330in OD/.595in ID version for bronze guides is also available (BTR's BS-prefixed shims).
What application are these shims for?
These shims are used under stock valve guides to adjust installed spring height.

