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1999–2005 Mazda MX-5 Miata Engine Components FAQ's

Please read our FAQs page to find out more.

What should I service before adding power to an NB?

Timing belt/water pump, cam/crank seals, hoses, ignition tune‑up, and compression/leakdown. Address any cooling or oil leaks before tuning.

NB1 vs NB2—does VVT change upgrade paths?

2001+ NB2 engines add VVT, broadening mid‑range torque. Tuning and matching cams/intake help maximize gains; both NB1/NB2 respond well to breathing and cooling mods.

Are rods/pistons needed for moderate boost on the BP?

Many modest turbo setups run on stock internals with conservative tuning and good cooling. For higher targets, forged pistons/rods and upgraded fasteners add margin.