Boundary Shim Kit for 89-05 Ford/Mazda I4 BP with 7/14/21/28/35 PSI & Retaini...

Boundary Shim Kit for 1989–2005 Ford/Mazda I4 BP Brand: Boundary Precision shim kit engineered for all BP-series 4-cylinder turbochargers used on 1989–2005 Ford and Mazda applications. Restore correct turbo shaft clearance, reduce shaft play, and extend turbo life with this complete set. Includes: Shims for 7, 14, 21, 28, and 35 PSI tolerance adjustments plus retaining pin Compatibility: Fits BP-series I4 turbochargers across Ford and Mazda models from 1989–2005 Benefits: Accurate preload adjustment, improved bearing alignment, quieter operation, and reduced turbo wear Quality: Durable, precision-cut shims for repeatable installation Ideal for rebuilds, performance upgrades, or routine maintenance. Simple to use with basic turbo disassembly—adjust to manufacturer spec for optimal boost response and longevity. Why choose Boundary: Trusted OEM-fit replacement parts designed for reliable performance and long service life.