All Balls Racing 15-17 Arctic Cat ZR 4000 EFI Jack Shaft Bearing & Seal Kit Upper Shaft 2009-audi-a6-base-esi3533387 This allows maximum flow and

This allows maximum flow and low turbulence for increased torque

or removal of factory components

The tailpipe diameter is larger than standard stock tailpipes

This system outflows the factory intake

All Balls Racing 15-17 Arctic Cat ZR 4000 EFI Jack Shaft Bearing & Seal Kit Upper Shaft 2009-audi-a6-base-esi3533387 This allows maximum flow andAll Balls Racing Jack Shaft Kits contain chain case input bearing, support bearing, seals, O rings and necessary components needed to install this kit on your vehicle All Balls Racing Jack Shaft Kits contain chain case input bearing, support bearing, seals, O rings and necessary components needed to install this kit on your vehicle Seals are Type TC double lip seals with stainless steel garter springs