GPR Exhaust - Trioval Double Slip-On for Ducati ST4 ST4 S - 1999 to 2005 Muffler with:dB Killer-Link Pipes separate compartments to keep gear

separate compartments to keep gear organized

even stops larger stones

With this attachment adapter

This can lead to dangerous situations on the road

for casual trail riders

GPR Exhaust - Trioval Double Slip-On for Ducati ST4 ST4 S - 1999 to 2005 Muffler with:dB Killer-Link Pipes separate compartments to keep gearGPR's Trioval series is a GPR best seller, with a classic ovoid drop shape. It is made of hand polished 304 stainless steel and has a diameter of 100mm. Product Features SOUND: Upgraded sound from stock exhaust. Although louder than stock but in compliance with the limits prescribed by law, this exhaust produces the softest sound of all the GPR exhausts. PERFORMANCE: Upgraded performance from stock exhaust QUALITY: Italian made with high grade welding