SG Model Engines VP Custom Sleeve Modifying for AXE Rossi Engines, HOT MOD Modified by Jim Hottinger . 

The VP Sleeve modified engines increase the air & fuel mixture flow through the engine that increases the HP and RPM from 10% to 20%.

The modified engines produce an average of 15% more power and RPM that voids the factory warranty.

SG Model Engines offer warranty replacement parts for the modified engines at 50% of the catalog price.  These parts are the pinston & sleeve, connecting rod, wrist pin & clips and ball bearings.

Rossi engines are hand made in Italy, built to the most precise tolerances, with the finest Swiss CNC machine equipment, using the best quality materials to give you the highest performance and longest life.