Exhaust Modifications
Exhaust Modifications
Section titled “Exhaust Modifications”Exhaust modifications provide the most noticeable naturally aspirated gains and dramatically change the car’s character.
Exhaust Components
Section titled “Exhaust Components”Headers
Section titled “Headers”- Stock manifold: Cast iron, restrictive
- Supersprint stepped headers: Best quality, 5-10 whp
- OBX headers: Budget option, fitment can be challenging
Catalytic Converter Section
Section titled “Catalytic Converter Section”- High-flow cats: Retain emissions compliance, reduce restriction
- Test pipes/cat delete: Maximum flow, emissions non-compliant
- Gains: 5-10 whp from high-flow cats
Cat-Back Exhaust
Section titled “Cat-Back Exhaust”- Supersprint: Premium quality, multiple configurations
- Borla: Stainless steel, good sound
- Magnaflow: Budget-friendly, decent sound
- Custom 2.5” mandrel-bent: Best value for flow
Sound Character
Section titled “Sound Character”- Headers + high-flow cats + cat-back = significant sound increase
- The M54 inline-6 has a distinctive smooth exhaust note
- Resonator delete adds rasp; some prefer it, others don’t