This is an SC14 Supercharger off of a later model Toyota Previa S/C. Its a 1.4 liter roots style blower. GREAT for an upgrade to your SC12 on a Supercharged Toyota MR2 88-89. Also great for a solid base on a <2.2 liter supercharger build. Corolla, MR2..any 4age ppl. stock pulley is a clutch type and is typically good for around 7-8psi. pulley kits are available for this for ranges of 12-18+psi.....The unit is used, but still fully functional and ready to be installed. Comes with all piping, Electronic Bypass Valve and cut harness. $100 obo