RST25/28 Turbo Kit

The ISR Performance Turbo Kit is engineered for the 1999-2005 Mazda Miata NB 1.8L. This comprehensive kit includes the proven ISR RST25/28 turbocharger, aiming for a complete bolt-on installation experience. When installed on a stock BP 1.8 engine, this setup has demonstrated the capability to produce up to 210 rear-wheel horsepower (rwhp) at 8 psi of boost. The kit features a full tubular schedule 40 turbo manifold, designed to prevent cracking and constructed from 304 stainless steel. It is built to accommodate compact T25, T28, and GT-style turbochargers. Some listings indicate that this specific part number (IS-NB18TURBOKIT-T28) may not include the turbocharger itself and requires a separate purchase of a T25 or T28 turbocharger. Additionally, a Reddit discussion mentions that while the kit is functional, it may be missing a few key components, potentially requiring an additional investment of around $1000 or more for supplementary parts. Further research or direct contact with ISR Performance may be advised to confirm exact inclusions and any additional necessary hardware or tuning requirements for optimal performance and reliability.