Exhaust› Catalytic Converters

RV6 Performance

PCD Downpipe with 300-Cell Catalytic Converter

$579.00

SKU: PCD-CIVIC-20

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The RV6 Performance PCD Downpipe is a high-flow catalytic converter designed to improve exhaust gas flow. It features a 300-cell high-temperature catalytic converter and is constructed from 304 stainless steel. The downpipe includes a precision-cast engine-to-tube transition for smooth flow and 2.5" mandrel-bent tubing.
Show original supplier description
The RV6 Performance PCD Downpipe is engineered to replace the restrictive factory precat on the 2022+ Honda Civic 2.0L, which is designed for mass production rather than optimal flow. This downpipe addresses the power-choking restriction by providing a smooth, turbulence-free path for exhaust gases. The unit features a high-strength 304 stainless steel construction, including a precision-cast engine-to-tube transition that was modeled in Solidworks and verified with advanced flow analysis. The tubing is 2.5" mandrel-bent 304 stainless steel, paired with a 304 stainless flange. It incorporates a 300-cell high-temperature, high-flow catalytic converter. The entire system is fully TIG welded with argon back-gassing for clean welds. Installation is facilitated by included hardware, such as non-foulers, chromoly exhaust studs, and gaskets. Buyers can choose between a raw finish or a silver ceramic coating for added durability and thermal management. Proper tuning is recommended to unlock the full potential of this downpipe.
Vehicle Symptoms
  • Loss of power during acceleration
  • Check engine light illuminated
  • Reduced fuel economy
  • Sluggish throttle response
  • Exhaust smell or rattling noise
Diagnostic Codes
  • P0420 – Cat Sys Efficiency Below Threshold (B1)
Relevant Conversations
  • 2022+ Honda Civic 2.0L downpipe upgrade
  • RV6 Performance downpipe review Civic
  • P0420 code fix Honda Civic 2.0
  • 300 cell catalytic converter vs stock
  • Civic 2.0L exhaust restriction fix
  • Downpipe installation instructions Civic
  • Best downpipe for 11th gen Civic
  • Civic check engine light after downpipe
  • How to pass emissions with aftermarket cat
  • Civic sluggish acceleration after cat replacement

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRV6 Performance
Part NumberPCD-CIVIC-20
CategoryExhaust
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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