Description
Upgrade the exhaust flow and turbocharger response of your Honda Civic Type R with the MST 5" Catted Downpipe (HD-TPR03), engineered for 2017-2026 Honda Civic Type R FL5 and FK8 applications. Designed as a high-performance alternative to the factory downpipe, this system combines a 3.5-inch turbo outlet section with a large 5-inch high-flow catalytic converter to improve exhaust flow while maintaining a catalytic converter for reduced emissions compared with a catless design.
At the heart of the downpipe is a 300-cell metal catalytic converter, selected to provide a balance between exhaust flow and emissions control. The high-flow catalyst helps reduce exhaust restriction compared with a conventional factory-style configuration while supporting improved turbocharger response and overall engine performance.
The MST downpipe features a 3.5-inch diameter outlet directly from the turbocharger, transitioning into the oversized 5-inch catalytic section. This high-flow design is intended to reduce exhaust backpressure and help the turbocharger spool more efficiently, potentially improving throttle response and power delivery throughout the RPM range.
The MST 300-cell catted downpipe is suitable for both stock and tuned vehicles and is designed for enthusiasts seeking improved exhaust performance without choosing a completely catless configuration.
Key Features
- MST HD-TPR03 performance downpipe
- Designed for 2017-2026 Honda Civic Type R
- Compatible with FK8 and FL5 chassis applications
- 3.5-inch diameter turbo outlet section
- Large 5-inch high-flow catalytic converter
- 300-cell metal catalytic converter
- Designed to reduce exhaust restriction and backpressure
- Helps improve turbocharger spool and throttle response
- Supports stronger performance across low, mid, and high RPM ranges
- Suitable for stock or tuned vehicles
- High-flow catted design for a performance-focused exhaust system
- Includes a two-year catalytic converter warranty subject to the manufacturer's stated warranty conditions
Important Fitment Information
This downpipe is listed for 2017-2026 Honda Civic Type R FL5/FK8 models. However, model-year and regional specifications can vary, particularly during transitional production years.
Before ordering, verify whether your vehicle uses a GPF/OPF-equipped or non-GPF/OPF configuration. Customers are strongly encouraged to verify compatibility with the manufacturer or provide an engine-bay photo before purchasing when fitment is uncertain.
CEL Warranty
MST provides a two-year catalytic converter warranty under the stated warranty terms. Warranty replacement applies only when a Check Engine Light is explicitly determined to have been triggered by the catalytic converter. The original downpipe must be returned and confirmed received by the original dealer before a replacement is shipped. Customers are responsible for applicable domestic and return shipping costs.
Important Legal Notice
OFF-ROAD / RACE USE ONLY. This product is not certified as a U.S. 50-state emissions-legal component and may not be legal for use on public roads in certain jurisdictions. Check your local emissions and vehicle regulations before purchasing or installing.
Import Duties & Shipping
Customers are responsible for all applicable import duties, customs fees, taxes, and brokerage charges associated with their shipment. These charges are not included in the purchase price and are determined by the destination country's customs authorities.
Shipments may be sent using UPS, DHL Express, or FedEx. Customers should verify applicable customs requirements and potential import charges before ordering.
For duty-related returns, refunds are processed only after the returned package is physically received. Return shipping costs, re-import duties, and other applicable charges may be deducted from the refund.
Note: Due to regional variations, GPF/OPF configurations, and transitional model years, verify exact vehicle compatibility before purchase.
