Description
DC Sports 4-1 Header for 02-06 Acura RSX Type-S (K20A2)
The header replaces the stock cast manifold with thick-wall T-409 stainless, mandrel-bent primaries, and a CNC-machined race-style 4-1 collector. It is 50-state legal under EO D-370-14 and remains compatible with stock emissions components and most aftermarket exhausts.
Performance characteristics
- True equal-length, large-diameter runners improve throttle response and power delivery through VTEC, enhancing mid-range torque and top-end strength on the K20A2.
- Ceramic coating (inside and out, up to 1,200 °F) reduces radiant heat, helping manage intake temperatures and under-hood heat in traffic or hot track sessions.
- Thick 3/8" flanges, precision mandrel bends, and robust welds reduce the risk of leaks or warping, supporting consistent performance and minimizing post-install adjustments.
- OEM-location secondary O₂ bung and factory-style two-bolt flange enable compatibility with the stock cat and emissions gear, keeping daily-driving practicality intact for 2002 Acura RSX.
Fitment and compatibility
Fits 2002–2006 Acura RSX Type-S (K20A2). Compatible with stock or most aftermarket exhaust systems and delivers a clean K-series header upgrade that remains CARB legal.
Use cases and installer considerations
- Appeals to customers building a K-series performance platform who seek improved throttle response, stronger mid-range torque, and a recognizable exhaust note without compromising emissions compliance.
- Common install scenario includes pairing with a stock or aftermarket cat-back system, followed by an ECU reflash to maximize power gains.
- Suitable for autocross, canyon runs, or frequent track days where consistent performance and reliability are valued by your shoppers.
