Stainless Steel Long Tube Header for Cadillac CTS-V (2004-2007) 5.7L 6.0L Engines

Unleash the LS6 & LS2: High-Velocity 4-1 Long Tube Headers for 2004-2007 Cadillac CTS-V

Who It’s For: Engineered for 2004-2007 Cadillac CTS-V (V1) owners running the high-output LS6 or LS2 powerplants who are tired of the stock manifold’s restrictive breathing and muffled exhaust note.

The Symptom: The factory exhaust manifolds on the 5.7L and 6.0L V8 engines are designed for mass production and engine bay clearance, not peak scavenging. These cast units force exhaust pulses from multiple cylinders into a cramped common chamber almost immediately, creating significant backpressure and pulse interference. This turbulence prevents the LS engine from effectively "exhaling," resulting in a muted exhaust note and a noticeable flat spot in the mid-range torque curve where the Cadillac should be pulling hardest.

The Engineering Fix: Our 4-1 long tube design utilizes high-flow 1-3/4" primary tubes to isolate each cylinder’s exhaust pulse, preventing the "collision" of gasses found in stock setups. By extending the length of the runners before merging into the 3" collector, we create a vacuum effect known as scavenging. This pull helps draw the remaining spent gasses out of the combustion chamber while simultaneously drawing in a fresher, denser intake charge. The result is a massive improvement in volumetric efficiency and a throttle response that feels instantaneous.

Why Mechanics Choose This Kit

• [The Power]: Optimizing the exhaust path for the LS platform yields an instant gain of 10-15 HP and Torque by reducing the pumping losses the engine must overcome.
• [The Sound]: Replacing the restrictive factory baffles with long-tube runners transforms the CTS-V into a true muscle sedan, delivering a crisp, aggressive V8 growl under acceleration.
• [The Build]: Constructed from premium T-304 Stainless Steel with TIG-welded CNC machine flanges for a leak-free seal and high-temperature durability.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 2004 Cadillac CTS-V (5.7L LS6)
• 2005 Cadillac CTS-V (5.7L LS6)
• 2006 Cadillac CTS-V (6.0L LS2)
• 2007 Cadillac CTS-V (6.0L LS2)

Interchange Part Numbers:

T-304 Stainless Steel, 1-3/4 OD, 3 OD, 4-1 Full Length Header, TIG Welded CNC Machine Flanges, O2 Sensor Bungs Included

The Performance Promise

Installation Pro-Tip: If you are selecting the Black Coated variant, please note that the coating is a temporary layer applied to prevent oxidation during storage and transit. To ensure a lifetime of corrosion resistance, our tuners recommend stripping this storage paint and applying a high-quality ceramic or high-temp header paint prior to installation. Buy with confidence. Backed by real automotive experts and fast shipping.