Alfa Stelvio Quadrifoglio - Ragazzon catalytic converter replacement L+R + OPF delete

Ragazzon catless downpipes with GPF delete – Alfa Romeo Stelvio Quadrifoglio (2.9 Bi-Turbo)
Part number: 50.1158.80

This set replaces the original catalytic converters and gasoline particulate filters (GPF/OPF) with stainless steel catless pipes. Result: noticeably freer flow, less backpressure and a more direct response. Made for the Stelvio Q (2.9 V6 Bi-Turbo) with Euro 6D / models from approx. 08-2018 with GPF.

What you get

• Left + right catless downpipes (Group N), including all connection points for the original lambda sensors

• Ø76 mm pipe diameter for high flow

• Stainless steel with a neat fit and solid welding

• Can be fitted to the original center section or Ragazzon center section (order adapter separately)

What you will notice

• Faster throttle response and quicker acceleration

• Lower backpressure, more potential for tuning

• Fuller, sportier sound

Important to know

• ECU modification is highly recommended/required to prevent fault codes and optimize performance

• Primarily intended for circuit/track use; check local laws for use on public roads

H&S Corse advice
Want to get the most out of your Stelvio Q? Combine this set with our custom-written ECU software and a suitable center section or complete exhaust system. We are happy to help you with the right configuration for your goal (street-friendly or track-oriented).