What is a cat-back exhaust system?

A cat-back exhaust system replaces the factory exhaust components from the catalytic converter all the way back to the tailpipe. It's a common upgrade for changing the vehicle's sound and improving exhaust flow.

What material is this exhaust made from?

This HKS Hi-Power 409 exhaust system is constructed from SUS304 stainless steel. This material is chosen for its durability and resistance to rust and corrosion, helping the exhaust last longer.

Does this exhaust system come with all necessary installation hardware?

Typically, cat-back exhaust systems include the main piping and muffler assembly. It is recommended to check the manufacturer's included parts list or installation instructions to confirm if all necessary gaskets, hangers, or clamps are provided, as sometimes factory hardware is reused or additional items may be needed.

HKS Hi-Power 409 Cat-Back Exhaust 31006-AM004

Name: HKS Hi-Power 409 CP9A/CN9A 4G63
Brand: HKS
SKU: hks-hks-hi-power-409-cp9a-cn9a-4g63-t14-113226
Price: 1584.90 USD
Availability: BackOrder

HKS Hi-Power 409 CP9A/CN9A 4G63

$1584.90

On Backorder — Expected to ship by Jun 19, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

HKS Hi-Power 409 cat-back exhaust for CP9A/CN9A 4G63.

Key Features

Fits CP9A and CN9A models with the 4G63 engine.
Constructed from SUS304 stainless steel for strength and corrosion resistance.
Designed to replace the factory exhaust system from the catalytic converter back.
Produces a sporty exhaust tone.
Features a muffler designed for a balance of sound and daily drivability.

This cat-back exhaust system is designed for specific CP9A and CN9A models equipped with the 4G63 engine. Please verify your vehicle's exact model and engine to ensure compatibility.

Secure CheckoutFast Shipping631-982-0042

Product Details

This is the HKS Hi-Power 409 cat-back exhaust system, specifically made for the CP9A and CN9A models equipped with the 4G63 engine. If you're looking to change the sound and performance of your exhaust system, a cat-back like this replaces the factory piping from the catalytic converter back to the tailpipe. It's a popular choice for enthusiasts wanting a more aggressive exhaust note and potentially improved exhaust flow.

The Hi-Power 409 series is known for its durable construction and distinct sound. This system is built from SUS304 stainless steel, which is strong and resists corrosion well, meaning it should hold up over time even in varied weather conditions. The muffler design is intended to provide a sporty tone without being overly loud or droney, making it suitable for daily driving as well as spirited runs. Installation typically involves unbolting the stock exhaust and bolting this new system in its place, though some minor adjustments might be needed to ensure perfect alignment.

When installing a cat-back exhaust, it's a good idea to have a helper to support the weight of the system as you work. You'll also want to check the condition of your existing hangers and mounts, as they can sometimes wear out and may need replacement to properly support the new exhaust. This HKS system is designed to fit right, but always refer to the manufacturer's installation instructions for the most accurate guidance.