Assault 2:1 Exhaust Systems / '91-'05 Dyna

The Trask Assault 2:1 for '91-'05 Dyna models covers the Evo and early Twin Cam Dyna range in hand built 16GA stainless.

A '91-'05 Dyna spans two engine generations, Evo through early Twin Cam, and most of these bikes have been modified more than once by now. What a hand built stainless system offers a bike at that stage is permanence: mandrel bent tubing that holds its diameter, welds purged from the inside, and construction that does not become the weak link.

How the Assault System Is Built

Stainless steel is mandrel bent so the inside diameter stays consistent through every curve, then TIG welded. A double slip fit and gusset add strength where the system takes vibration from a rubber mount chassis. Custom heat shields with wire-tied fasteners carry the race inspired look Trask is known for.

Assault 2:1 '91-'05 Dyna Specifications

• Handmade from high quality 16GA stainless steel
• Mandrel bent, gas purged and TIG welded
• Custom heat shields with wire-tied fasteners
• Double slip fit and gusset for additional strength
• 18 mm O2 ports included
• Finishes: black ceramic/stainless or stainless/stainless
• Made in the USA

Assault 2:1 '91-'05 Dyna Fitment

• Fits '91-'05 FXD and FXDWG with mid or forward controls

Drag Specialties splits this fitment across its two catalogs — the OldBook lists these part numbers for '91-'98 and the FatBook for '99-'05. They are the same parts, so the system covers the full '91-'05 span.

Emissions

Drag Specialties lists both finishes as EMIS 3. What the emissions codes mean

⚠️ VERIFY exact fitment against your bike, and plan on retuning after installation.