ISR Performance RS T25/28 Turbo Kit Without Turbo - 99-05 Mazda Miata NB 1.8L

Already have a turbocharger, or planning to run something other than the ISR RS T25/28? This ISR Performance NB Miata turbo kit without turbo delivers the full supporting hardware for the 1999 to 2005 Mazda Miata 1.8L and leaves the turbo choice to you. Everything else from the complete kit is here: manifold, intercooler system, hot side exhaust and plumbing.

Turbocharger compatibility

The kit is designed around compact GT style T25 and T28 turbochargers. For a straight bolt-on installation you will need a GT style T28 with a bolt-on cover. Other T25 flanged units, such as a Garrett GT2871, can be used with simple modifications. If you would rather have ISR supply the turbo, the complete version is part number IS-NB18TurboKit-T28.

Hardware and materials

• Full tubular schedule 40 bottom mount turbo manifold built to resist cracking
• 304 stainless steel exhaust components
• Chassis specific intercooler with its own mounting bracket for a rigid fit
• Fully polished aluminum intercooler piping
• AN oil feed and water lines, plus an AN drain line with an aluminum weld bung for the stock oil pan
• Modular hotpipe that works with ISR, HKS, GReddy and Tial flanges (sold separately)

Fits

1999-2005 Mazda Miata NB, 1.8L engine.

Included parts

• Schedule 40 bottom mount turbo manifold
• Intercooler and piping kit
• Turbine O2 housing and downpipe
• Full oil and water turbo lines with 10AN aluminum weld bung for the oil pan
• AFM delete intake with air filter

Not included: the turbocharger.

Installation notes

Intended for use with an aftermarket ECU running a MAP sensor. A 2.5 inch hole needs to be drilled for the intercooler pipe routing.

All ISR Performance products are designed for off-road use only.