What is the benefit of the Power Bomb module?

The Power Bomb module is a patented component that acts as a pre-muffler. It helps manage exhaust sonics by allowing gases to expand and contract, which increases flow by nearly 10% and provides more surface area for sound absorption to lower overall noise.

What material is used for the sound-absorbing packing?

The muffler utilizes steel wool packing to absorb sound waves. This material works in conjunction with the perforated core to help dissipate the energy of the exhaust gases and reduce noise.

Does this muffler come with all necessary installation hardware?

Installation hardware is not explicitly listed as included in the manufacturer's description. It is recommended to refer to the manufacturer's installation instructions or contact FMF Racing for details on what is included.

Specifications

Brand: FMF Racing
Part #: 042320

FMF Racing Kawasaki KLR600/650/Tengai 84-07 Q4 S/A Muffler

Name: FMF Racing Kawasaki KLR600/650/Tengai 84-07 Q4 S/A Muffler
Brand: FMF Racing
SKU: fmf-racing-fmf-racing-kawasaki-klr600-650-tengai-84-07-q4-s-a-muffler-t14-686912
Price: 495.35 USD
Availability: BackOrder

$495.35

On Backorder — Expected to ship by Apr 28, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

FMF Racing Q4 S/A Muffler for Kawasaki KLR600/650/Tengai 84-07. Features Power Bomb module for improved flow and reduced sound.

Key Features

Fits Kawasaki KLR600, KLR650, and Tengai models from 1984-2007.
Incorporates FMF's patented Power Bomb module for improved exhaust flow.
The Power Bomb acts as a pre-muffler, increasing sound-absorbing surface area.
Perforated core design helps manage sound waves and reduce noise output.
Designed to increase flow by nearly 10% compared to stock systems.
Uses steel wool packing for effective sound absorption.

This muffler is designed to fit Kawasaki KLR600, KLR650, and Tengai models produced between 1984 and 2007.

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About this part

Product Details

The FMF Racing Q4 S/A Muffler uses a patented Power Bomb module, strategically placed in the header system. This design helps manage exhaust sonics by allowing expansion and contraction, which results in a nearly 10% increase in flow. The perforated core directs sound waves into the steel wool packing, where the gases expand and cool before ramping back up at higher RPMs. Think of the Power Bomb as a pre-muffler; it adds more surface area for sound absorption, helping to lower the overall sound output of your motorcycle.

This muffler is built to fit Kawasaki KLR600, KLR650, and Tengai models from 1984 through 2007. The construction focuses on both performance and sound management, offering a noticeable improvement over stock components. You can expect a deeper tone and a more controlled exhaust note, making your ride more enjoyable without being overly loud.