THUNDERHEADER Black X-Series Exhaust System – 1073XB

Thunderheader Black X-Series Exhaust System – 1073XB

Thunderheader™ X-Series™ 2-into 1 exhaust systems for Touring models is our large diameter exhaust specifically designed for big cubic inch engines, built to produce big numbers

The X-Series™ is designed with 2 in. primary tubes with a 12-degree transition chamber to allow more exhaust flow

Unique patented baffle in conjunction with the trademark tail cone is designed to allow a free-flowing exhaust while creating an anti-reversion condition in the pipe which will aid the air/fuel flow on the intake stroke to allow more fuel into the combustion chamber

This means more torque at the low and mid RPM ranges and maximum horsepower at top end

Complete with heat shields and all mounting hardware, and 12mm O2 sensor bungs

O2 sensor ports are pre-installed with O2 sensor plugs

Included Items:

(1) Chrome steel 2 into 1 header assembly W/black steel heat shields installed

(1) Black steel muffler assembly

(1) Black steel muffler heat shield

(11) Small black hose clamps

(2) Large black hose clamps

(1) Band clamp

(1) 5/16″-18 x 1/2″ Hex head bolt

(3) 5/16″ Flat washers

(1) 5/16″-18 x 3/4″ Hex head bolt

(1) 5/16″-18 Nylock nut

(1) 5/16″-18 Hex nut

(1) Black steel mounting bracket

(1) Black steel square spacer

(2) Black aluminum round spacers

(1) 3/8″-16 s 3″ Socket cap head bolt

(2) 3/8″-16 x 1-3/4″ Socket cap head bolts

Specifications

Color Black

Mfg #: 1073XB

Part #: 4409870

Style Tapered Tip

Type 2-Into-1 System

Units Each

Weight 31.25 lbs