QD Black Underseat Decat Exhaust System Ducati Streetfighter V4 (S) 2021-24

Transform your Ducati Streetfighter V4 with the Decat Racing version of the QD Black Underseat Exhaust System

Designed for track use and serious performance enthusiasts, this race-only system delivers raw power, reduced weight, and an aggressive MotoGP-inspired aesthetic — complete with GP-style titanium silencers.

This version removes the catalytic converter for unrestricted flow and maximum output. When paired with the T800 UpMap ECU remap (sold separately), expect a significant performance boost and sharper throttle response.

Key Features & Specifications

• Fitment: Ducati Streetfighter V4
• Silencers: Twin Gunshot Dark Matter titanium silencers with black ceramic coating and carbon fibre end caps
• System Type: Semi-complete decat system with manifolds and 52mm diameter fittings (no catalysts)
• Valve Integration: Includes 2-into-1 fitting with servo-controlled valve (retains factory servo motor)
• Remap Option: T800 UpMap system available separately for optimal fuelling and performance
• Bracketry: Includes widened passenger footrest brackets
• Licence Plate Holder: QD number plate support included and fully compatible
• Warranty: 30-month manufacturer’s warranty with Service Card registration
• Homologation: Not homologated

Why Choose the Decat Racing QD Exhaust for Streetfighter V4?

• Race-focused design for maximum flow and power
• Underseat layout inspired by MotoGP factory bikes
• Significant weight savings over OEM exhaust
  
• Black ceramic finish and carbon tips add stealth performance styling
• Backed by QD’s 30-month manufacturer’s warranty

What’s Included?

• 2 x QD Gunshot Dark Matter Titanium Silencers
• Full decat pipework with 2-into-1 servo valve section
• Passenger footrest support brackets
• QD Licence Plate Holder
• Service Card for warranty activation
• Mounting hardware and fitting kit

Assembly Instructions & Warnings

This is a decat racing exhaust system and is not homologated for road use. Removal of the factory catalytic converter is required. Professional installation is strongly recommended due to the complexity of underseat routing and servo valve integration.

It is highly recommended to install the T800 UpMap ECU remap module, available separately.

The system is designed for closed-course and competition use only. Use on public roads may be restricted by local regulations.

UK Stock Items: Orders for items held in UK stock are normally dispatched within 24 hours.

For UK Mainland: Royal Mail: £5.50 and Courier £8.92

Supplier Items: Items sourced from suppliers are usually dispatched within 5–10 working days once they arrive with us.

Order Cut-Off: Orders placed before 2PM (Monday to Friday) are typically dispatched the same working day, subject to stock availability.

International Delivery: We ship worldwide. Most international orders arrive within 7 working days from dispatch, though delivery times can vary depending on destination and customs processing.

Courier Responsibility: Once an order has been dispatched, delivery timescales are determined by the courier. Tracking information will be provided where available.

Customer Responsibility: Customers must ensure safe receipt of their order. Additional charges may apply if repeated delivery attempts fail due to no one being available, or if incorrect delivery information has been supplied.