2025 Streetfighter V4 Termignoni Slip-on Under-Seat Exhaust – D24209400ITC

The 2025 Streetfighter V4 Termignoni Slip-on Under-seat Exhaust (D24209400ITC) is a “semi-complete” racing solution that fundamentally changes the bike’s character. By relocating the exhaust to the iconic under-seat position and removing the catalyst, this system drastically reduces weight, lowers operating temperatures, and provides the raw, mechanical roar of a MotoGP machine.

The 2025 Streetfighter V4 is a masterpiece of aggressive design, yet the factory exhaust is heavily muffled by the massive catalytic converter required for Euro 5+ compliance.

Engineering & Power: The “Semi-Complete” Advantage

Unlike standard slip-ons that merely replace the mufflers, the D242 system includes a high-flow stainless steel mid-pipe.This assembly replaces the entire OEM rear header and the catalytic converter.

• Enhanced Evacuation: By streamlining the path of exhaust gases from the rear cylinders, the system eliminates backpressure, resulting in explosive mid-range torque and higher peak power.
• Thermal Management: Deleting the catalytic converter removes the “heat soak” effect from beneath the engine, keeping the rear shock and the rider’s legs significantly cooler during high-intensity sessions.
• Aggressive Weight Reduction: Replacing heavy steel and ceramic internals with a Titanium and Carbon Fiber assembly sheds a substantial amount of weight from the bike’s center.

🛡️ Technical Specifications & Materials

The Full Racing Package: UpMap T800+

Because this system removes the catalytic converter, the engine requires a revised fueling strategy to prevent lean-running conditions.

• Plug & Play Tuning: This kit includes the UpMap T800+ device and the necessary cable.
• Optimized ECU: The provided voucher allows you to flash the dedicated Termignoni Racing Map, which optimizes the air-fuel ratio, removes exhaust valve errors, and smooths out the throttle transition for track use.

❓ FAQ: Expert Performance Insights

“Is this street legal?”

No. This is a Racing Use Only system. The removal of the catalytic converter means it does not meet emissions or noise standards for public roads. It is designed for closed-course competition.

“How does the ‘Under-seat’ fitment affect the bike?”

Relocating the silencers to the under-seat position clears up the area around the rear wheel and swingarm, providing a narrower profile and a classic Ducati “Superbike” aesthetic.

“Do I need to buy anything else for installation?”

No. The kit is comprehensive. However, because you are replacing the rear headers, we recommend using fresh exhaust gaskets (sold separately) to ensure a 100% leak-free seal.

Peer Insight: The 2025 Streetfighter V4 Termignoni Slip-on Under-seat Exhaust is the most “complete” slip-on Termignoni offers. Because it replaces the rear headers, you’re getting performance gains very close to a full system but at a significantly lower price point. The sound is incredibly sharp—pure V4 music.

Installation instructions/D24209400itc