Dinan D660-0086 Free Flow Axle-Back Exhaust System Polished Tips

The Dinan D660-0086 Free Flow Axle-Back Exhaust is a bolt-on performance upgrade engineered to deliver a deeper, more aggressive exhaust note along with measurable power gains. Built from 100% 304 brushed stainless steel with full TIG welding, this system is approximately 5 lbs lighter than the stock exhaust while improving flow and sound character across the RPM range.

At the heart of the system is 76mm diameter tubing — an upgrade from the factory 70mm — paired with twin 76mm exhaust valves that are 30% less restrictive than OEM valves. The result is a verified gain of +8 HP and +6 FT-LB of torque at 6,600 RPM. The factory computer-controlled valve system is fully retained, routing exhaust through the muffler at low speeds for interior civility and opening fully under hard acceleration for a full, aggressive tone. Drone abatement technology built into the muffler ensures comfortable cabin noise levels at all times.

Key Features:

• +8 HP and +6 FT-LB torque gain at 6,600 RPM (dyno verified)
• 76mm main piping — up from 70mm stock for increased exhaust flow
• Twin 76mm computer-controlled exhaust valves, 30% less restrictive than OE
• Approximately 5 lbs lighter than the factory exhaust system
• 100% 304 brushed stainless steel construction with TIG welding
• Quad 4.5" (114mm) diameter, double-walled, polished and laser-engraved exhaust tips
• Proprietary "Tuck-it" tip design with inverted clamp neck for a clean, unblemished install
• Signature Dinan straight-cut tip design
• Easy bolt-on installation with all mounting hardware included

The four massive 114mm tips are designed to fill the factory valance cutout naturally, and the inverted clamp neck keeps all hardware hidden for a factory-quality appearance. Available in polished or black ceramic coated tip finishes to suit individual preferences.