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Thunderheader 2-into-1 High Performance Exhaust System - 1074

Part #:
4405543
Manufacturer Part #:
1074

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Overview of Thunderheader 2-into-1 High Performance Exhaust System - 1074

Increased horsepower, torque and unmistakable Thunderheader sound
Furnished with fittings for Oxygen sensors
Thunderheader head pipes have been tuned to the proper length and diameter to produce maximum horsepower and an excellent torque curve
A patented collector is used instead of a conventional baffle in the muffler
The collector is designed to direct spent gases through four acoustical dampening chambers
The flow director serves a multi-task function: directs outgoing flow through four acoustical dampening chambers creating a spiral motion upon exiting to atmosphere and it also forms a pyramidal shaped anti-reversion trap to minimize the amount of air rushing in
In conjunction with the flow director, a diffuser shroud is built into the reverse cone, this patented device is designed to diffuse the air rushing in as the pressure inside of the system becomes equal to atmosphere
Optional heat shields:
16 in. Top Rear #H25-013
22 in. Top Front #H25-014
28 in. Collector #H25-030

Included Items:
(1) Exhaust Header
(2) 5/16 in.-18 x 3/4 in. Hex Bolts
(6) 5/16 in. Plain Washers
(1) 5/16 in. Lock Washer
(1) 5/16 in.-18 Nut
(2) 5/16 in.-18 Lock Nuts
(1) Mounting Bracket
(1) 5/16 in.-18 x 1 1/2 in. Hex Bolt
(1) Clamp 1 3/4 in.
(1) Clamp 2 5/8 in.
(1) Collector 2 5/8 in.
(2) Floorboard Spacers
(1) 3/8 in.-16 x 3 in. Soc Bolt
(2) 3/8 in.-16 x 1 3/4 in. Soc Bolts

NOTE: This is a 2-into-1 standard length (right side only)

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