Wagner Tuning Monolith 300CPSI EU6 Ø130×120

Wagner Tuning Monolith 300CPSI EU6 Catalyst – Ø130x120mm

The Wagner Tuning Monolith 300CPSI EU6 is a high-quality universal catalyst module designed for custom exhaust fabrication. With a 130mm diameter and 120mm length, it features a EURO 6 specification coating and a 300 cells-per-square-inch (CPSI) substrate, striking a sensible balance between emissions control and exhaust flow.

This monolith is supplied as a weld-in component, allowing fabricators and tuners to integrate it into bespoke or modified exhaust systems where a standard off-the-shelf catalyst will not fit or perform as required.

What It Does

A catalyst converts harmful exhaust gases into less harmful ones before they exit the tailpipe. The “300CPSI” figure refers to how densely packed the internal honeycomb structure is – 300 cells per square inch is considered a sport specification, offering noticeably less restriction than a standard road catalyst (typically 400-600 CPSI) while still providing meaningful emissions reduction.

In practical terms, swapping a restrictive factory catalyst for a 300CPSI sport unit can free up exhaust flow, reduce backpressure and help the engine breathe more easily. On modified or higher-output engines, this can support modest power gains and improved throttle response.

Key Features

• EURO 6 specification precious metal coating for effective emissions conversion
• 300 CPSI substrate for reduced backpressure compared to standard catalysts
• Universal weld-in design suitable for custom exhaust builds
• Compact 130mm outer diameter x 120mm length format
• Built to Wagner Tuning’s motorsport quality standards

Technical Specifications

Important Usage Notice

This is a motorsport catalyst module intended for off-road and competition use only. By purchasing this product, you confirm it will not be fitted to a vehicle used on public roads. Road-legal emissions compliance varies by region, and this part is not certified or type-approved for general road use.

Fitment

As a universal component, this catalyst is designed to be welded into a custom or modified exhaust system rather than fitted to a specific vehicle. It is well suited to fabricators building one-off systems, replacing failed OEM catalysts in motorsport applications, or upgrading existing setups where reduced backpressure is desired. Pipework adapters or reducers may be required to suit your existing exhaust diameter.