Hello,

Can someone tell me what engine is in my car?

The original owner said its a series 4 13B turbo fitted with a series 5 inlet manifold.

What year model mazda would this engine have came out off?

excuse the messy engine bay, its under some serious modifications.

Its got an S4 coolant housing, looks lime a mechanical OMP. Id say S4

its got s5 rotor housings, so maybe its been rebuilt? i second the s4 water pump housing and mechanical metering pump, though

s4 motor

s4 would be 87-88, s5 would be 89-91