Cat Back Exhaust for Acura TSX (2004-2008) 2.4L

High-Flow Mandrel-Bent Cat-Back Exhaust for 2004-2008 Acura TSX

What it Does: The cat-back exhaust replaces the restrictive factory exhaust piping and chambered mufflers on the 2004-2008 TSX to reduce exhaust backpressure, maximize scavenging velocity, and produce a deeper exhaust tone.

The Stock Acura TSX Exhaust Restriction and Flow Degradation

Factory exhaust systems on the CL9 chassis rely on crush-bent aluminized steel tubing and heavily baffled multi-chamber mufflers designed strictly for sound suppression rather than gas velocity. Over time, stock piping suffers from thermal fatigue and corrosion at the stamped flanges. Furthermore, factory neck-downs and internal baffle chambers disrupt laminar exhaust flow, causing excessive exhaust backpressure that restricts the high-RPM breathing capacity of the VTEC crossover.

The Engineering Solution

This system replaces downstream restrictions with full T-304 stainless steel construction to eliminate corrosion failure and optimize thermal management. Featuring uniform 2.25-inch mandrel-bent tubing, this direct-fit configuration maintains constant inner diameter geometry through every radius, reducing turbulence and pumping losses. A free-flowing straight-through muffler dampens harsh frequencies without choking flow, terminating in an aggressive 4.5-inch polished tip. Precision TIG-welded OE-style hangers and factory-pattern flanges guarantee a true bolt-on installation using OEM mounting positions without requiring cutting or re-welding.

Technical Specifications

Compatibility

• 2004 Acura TSX Base Sedan 4-Door 2.4L 2354CC l4 DOHC
• 2005 Acura TSX Base Sedan 4-Door 2.4L 2354CC l4 DOHC
• 2006 Acura TSX Base Sedan 4-Door 2.4L 2354CC l4 DOHC
• 2007 Acura TSX Base Sedan 4-Door 2.4L 2354CC l4 DOHC
• 2008 Acura TSX Base Sedan 4-Door 2.4L 2354CC l4 DOHC

Frequently Asked Questions

Does this fit the CL9 TSX?
Yes, this is a direct fit for the 2004-2008 Acura TSX equipped with the K24A2 engine.

Will this cat-back trigger a Check Engine Light (CEL)?
No, because this system installs entirely aft of the factory catalytic converter and secondary O2 sensor, it retains complete emissions compliance and will not trip DTCs.

The Acura JDM Caliber

Tuned specifically for the high-revving characteristics of the naturally aspirated K-series platform, this exhaust provides the unchoked flow needed to unlock higher mid-range torque and a crisp, aggressive VTEC crossover without highway drone.