The factory downpipe is one of the biggest restrictions in the Elantra N exhaust system. The QKspl™ downpipe eliminates that bottleneck using a true 3-inch mandrel-bent design paired with a precision-cast bellmouth inlet.

Designed using 3D scanning and CAD modeling, this downpipe perfectly matches the turbo outlet to:

• Improve exhaust velocity
  
• Reduce backpressure
  
• Increase turbo efficiency
  

The result? Faster spool, more horsepower, and a noticeably more aggressive exhaust tone — especially under load.

This system is built for a seamless OEM-style installation. It connects directly to your factory exhaust and is fully compatible with most aftermarket cat-back systems.

Key fitment advantages:

• Reuses factory exhaust hangers
  
• Retains OEM heat shielding
  
• Precision TIG-welded for perfect alignment
  
• No cutting or fabrication required
  

Constructed from cast and mandrel-bent 304 stainless steel, this downpipe is built to handle extreme heat and long-term use — whether you're daily driving or hitting the track.

The cp-e® QKspl™ High Flow Cat Downpipe is engineered for true plug-and-play performance without the headaches. Thanks to the EcoF by Gesl high-flow catalytic converter, this system is designed to remain check engine light (CEL) free under normal operation — meaning you can install and drive with confidence.

Unlike many aftermarket downpipes that require immediate tuning, this setup is optimized for factory ECU compatibility, making it one of the most streetable and daily-driver-friendly upgrades available for the Hyundai Elantra N.