Stainless Works RTCMM 3in 200 Cell Metal Matrix High-Flow Catalytic Cat

Vehicle Fitment

• Universal - semi-universal fitment, intended for custom exhaust fabrication rather than a specific vehicle

Fitment Notes

• Fabrication required - this is a slip-fit component intended for welding into an existing or custom exhaust system, not a bolt-in/direct-fit part
• Not CARB legal - not for sale or use in California, and per federal EPA and state emissions regulations, this product may not be legal for installation on public roads or highways outside of pre-emissions vehicles (model year 1974 or earlier) or dedicated competition/racing use. Confirm your local emissions laws before installing this on a street-driven vehicle
• 3" inlet and 3" outlet, both slip-fit - confirm your exhaust piping diameter matches before ordering

Features

• Hi-flow metal matrix substrate with 200-cell density for maximum exhaust flow versus a standard-cell converter
• 9 gm/cubic ft precious metal load for effective emissions treatment at high flow rates
• Constructed from 304 stainless steel for maximum corrosion resistance and long-term durability
• Among the highest-flowing, most durable catalytic converters available on the aftermarket market
• Backed by Stainless Works' 2-year limited warranty on stainless steel construction

Specifications

• Inlet Diameter: 3" ID, slip fit
• Outlet Diameter: 3" OD, slip fit
• Body/Case Diameter: 4"
• Overall Length: 10-3/4"
• Substrate: Metal Matrix, 200 Cell
• Precious Metal Load: 9 gm/cubic ft
• Material: 304 Stainless Steel
• Weight: Approx. 5 lbs

Included Components

• 1x RTCMM Catalytic Converter

Product Description

Standard catalytic converters trade flow for emissions performance, and on a modified or high-output engine, that restriction shows up as backpressure that costs real power. Stainless Works' RTCMM addresses this with a metal matrix substrate at 200-cell density - a configuration built to flow significantly more freely than a ceramic honeycomb or higher-cell-count converter, while still carrying enough precious metal load (9 gm/cubic ft) to function as a genuine catalytic converter rather than a straight-through delete pipe.

Built from 304 stainless steel, the RTCMM is designed to hold up long-term against the heat and corrosion that degrade lower-grade exhaust components, backed by a 2-year limited warranty. With a 3" slip-fit inlet and outlet, it's meant to be welded into a custom exhaust system or paired with other Stainless Works components rather than dropped in as a direct factory replacement.

This converter suits builders fabricating a custom high-flow exhaust system who need genuine emissions catalysis without the backpressure penalty of a restrictive stock-style cat - commonly used in performance builds, track-prepped cars, and custom header/exhaust combinations. Given the CARB and street-legality restrictions noted above, this is best suited to off-road, competition, or non-emissions-regulated applications; check your local and state emissions laws carefully before installing this on a vehicle you plan to drive on public roads.