Description
Features
- Powercore 4 S/A has a U.S. Forestry approved maintenance free, stainless steel spark arrestor screen
- The latest version of the Powercore 4 design incorporates a hi-flow core which has more surface area to absorb more sound while flowing more exhaust
- Lighter, stronger and more powerful than stock exhausts
- Constructed with an extruded aluminum canister, a stainless steel mid-pipe that is MIG/TIG welded and has space age internal packing
| 2003 | Yamaha | TT-R90 |
| 2002 | Yamaha | TT-R90 |
| 2001 | Yamaha | TT-R90 |
| 2000 | Yamaha | TT-R90 |
| 2007 | Yamaha | TT-R90E |
| 2006 | Yamaha | TT-R90E |
| 2005 | Yamaha | TT-R90E |
| 2004 | Yamaha | TT-R90E |
| 2003 | Yamaha | TT-R90E |
