SKU 313541 — 304 stainless steel muffler (mirror-polished)
Overview
SKU 313541 is a purpose-built muffler for custom exhaust fabrication. Its 304 stainless steel shell is finished to a mirror polish for durability and a clean, show-ready appearance. Internally it uses a perforated tube packed with acoustic material to deliver tunable sound control, making it suitable for both street performance and race applications where longevity and adjustable tone matter.
What it does
– Perforated core with packing dampens mid- and high-frequency noise while keeping backpressure low.
– Reversible body and offset outlet allow flexible orientation during installation.
– Oval port geometry eases welding to oval tubing and simplifies aesthetic matching with polished tips.
Key specifications
– Material: 304 stainless steel, mirror-polished finish
– Internal: perforated stainless tube with replaceable packing
– Ports: 1 inlet / 1 outlet, both oval, 3.00 in nominal
– Body: oval case, 13.00 in 50 in width; 6.00 in height
– Design features: reversible orientation; offset outlet for tight-pack routing
Installation and fitment tips
– Mock up on the vehicle before final welds. Check clearance at full suspension travel and steering lock.
– Position hangers near the muffler’s center of mass to avoid stress on flanges and connections.
– Leave 0.5–1.0 in of clearance from heat-sensitive parts and allow room for thermal expansion.
– If you need to join round piping, use oval-to-round transition sleeves or small-diameter adapters to preserve alignment and flow.
– For welding: tack in three equidistant spots, verify alignment, then finish circumferential welds. Use backing bars or root supports for thin-wall areas to prevent burn-through.
Fabrication guidance
– Use welding consumables and procedures suited to 304 stainless steel to prevent contamination and loss of corrosion resistance. Post-weld cleaning and passivation are recommended to restore the bright finish.
– Protect the polished surface during assembly with masking or fixtures; polish any blemishes after final fitment.
– Maintain consistent packing compression to keep the designed acoustic behavior. Avoid spatter entering packing or perforations—shield packing entry points when welding.
– When converting oval ports to round pipe, allow for adapter geometry and torque from clamps. Templates, jigs or simple fixtures speed up repeatable installations and reduce rework.
Acoustic and performance notes
– Tone and decay respond predictably to packing density and the perforation pattern. Small changes to packing or perforation sizing let you tune character without redesigning the muffler.
– If you encounter low-frequency drone at cruising speeds, try altering piping lengths or adding a small chamber upstream of the muffler before increasing packing density.
– Start with a moderate packing density and iterate on-vehicle using tap tests or smartphone spectrograms to identify resonance bands.
Practical checks before purchase
– Confirm inlet/outlet diameters, orientations and
– Measure under-vehicle space to ensure the 13.00 in length, 9.50 in width and 6.00 in height clear suspension, heat shields and chassis.
– Plan weld access and adapter needs ahead of time—having a spare adapter or clamp kit on hand can save hours during final assembly.
Who benefits
– Fabricators building bespoke street systems or race exhausts will appreciate the muffler’s balance of durability, polishability and tunability.
– Installers benefit from the reversible design and offset outlet when routing in confined spaces.
– Enthusiasts get a durable, serviceable component that supports iterative tuning and keeps long-term maintenance simple.
Summary
SKU 313541 is a well-engineered, mirror-polished 304 stainless muffler that combines serviceability with acoustic control. Its perforated core and packing provide a tunable sound profile while the reversible, offset design eases fitment in tight layouts. Follow good stainless-steel welding practice, validate fitment on the vehicle, and tune packing and piping as part of a system-level approach for the best results.