THUNDERHEADER 2 into 1 High Performance Exhaust System – 1027

Thunderheader 2 into 1 High Performance Exhaust System – 1027

Designed to give maximum horsepower without sacrificing low-end torque

2-into-1 systems with patented collector design that directs spent exhaust gases in a spiral motion through four acoustical damping chambers

Exhaust travels through these chambers at high velocity to scavenge spent exhaust gases from the combustion chamber and bring in a fresh charge of air/fuel mixture

Anti-reversion design works to impede reverse flow through the system — reverse flow can contaminate the incoming fuel/air mixture, which reduces performance and throttle response

As reverse flow enters the collector, the diffuser deflects it through vents; the pyramidal trap and apertures impede the reverse flow, allowing time for the exhaust valve to close

Flow director has equal area at each end, allowing exhaust gases to travel at a constant velocity over the entire length to improve exhaust scavenging

OPTIONAL HEAT SHIELDS:

For 1986-99 FL models and all 2000-06 models, order 25-1656 for a full coverage set of 3

For 1986-99 FX models with forward controls, order the following: H25-033 9″ mid rear; H25-037 8″ top front; H25-029 13 1/2″ collector, H25-039 13 1/2″ top rear

For long style 23″ top rear heat shield order, H25-034

For long style 14″ top front heat shield order, H25-035

Included Items:

(1) Header

(2) 5/16-18 x 1-1/4 Hex Bolts

(2) 5/16 in. Plain Washers

(2) 5/16 in. Lock Washers

(2) 5/16 in. Nuts

(2) 3/8-16 x 3/4 in. Hex Bolts

(2) 3/8 in. Plain Washers

(1) Rear Support Bracket

Not all products are legal for sale or use on pollution controlled vehicles. Check your local laws and the manufacturers information

There is no warranty on exhaust pipes and mufflers with regard to any discoloration. Discoloration (bluing) is the result of tuning characteristics, cam timing, carburetor jetting, overheating, etc., and is not caused by defective manufacturing. See the CHEMS/LUBES section for products that will help prevent or remove bluing.

Installation of a new exhaust system may change your motorcycles fuel-air mixture requirements. Please consult the exhaust manufacturer directly with questions regarding any modifications that may need to be made during, or after, installing their product. If a jet kit or fuel processor is recommended, see the FUEL/INTAKE section

Specifications

Color Chrome

Finish Chrome

Mfg #: 1027

Part #: H44024

Style Tapered Tip

Type 2-Into-1 System

Units Each

Weight 19.31 lbs