This our full Modular Pulley System, it comes with our Modular Hub and a Modular Pulley of your choice.

By developing Ecotec specific pulleys we have run all the way down to 2.7" with out snout machining. However each snout is cast and machined differently so we only guaranty down to 2.8" without machining.

Recommended Pulley sizes based on 93 octane (91 add .1 - 89 add .3):

• 3.35" pulley - Stock OEM size
• 3.1" pulley - 42# injectors
• 3.0" pulley - Stage 2 Kit, ZZP Down pipe, 93 octane.
• 2.9" pulley - Stage 3 Kit, 60# injectors, Dual Pass End plate, Header/Down pipe, 93 octane.
• 2.8" pulley - 2.9" mods, plus 75% meth or e85
• 2.7" pulley - Stage 3 Kit, 60# injectors, Dual Pass End plate, Header/Down pipe, Stage 1+ cams
• 2.6" pulley - Stage 3 Kit, 60# injectors, Dual Pass End plate, Header/Down pipe, Stage 1+ cams, Ported Head

Recommended ZZP mod list, click HERE