Modifying exhaust system on BMW E46 328i (M52TUB28) - effects and costs

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Modifying exhaust system on BMW E46 328i (M52TUB28) - effects and costs

Potential modifications:

• Catback exhaust system
• Headers
• High-flow catalytic converters

Effects:

• Power gain: 8-18 hp (depending on modifications)
• Improved exhaust note
• Slight weight reduction

Popular options and costs:

• Magnaflow catback system:
  - Cost: £600-£750
  - Power gain: ~8-10 hp
• Supersprint headers:
  - Cost: £650-£850
  - Power gain: ~10-15 hp
• Eisenmann race exhaust:
  - Cost: £1300-£1500
  - Power gain: ~12-18 hp

Installation considerations:

• Professional installation recommended (£150-£250)
• May require ECU remapping for optimal performance (£200-£300)
• Ensure compliance with local noise and emissions regulations

Note: Combine exhaust modifications with intake and software upgrades for best results.