Bull Boost Valved Axle Back Exhaust Muffler System for Porsche 911 991 GT3 RS

Valved Axle Back Exhaust Muffler System by Bull Boost, made to fit the Porsche 911 as listed below. A performance exhaust changes the sound and can improve flow; replacement parts restore a quiet, leak-free system.

Key features

• Adjustable exhaust sound
• Compatible with 991, 991.1, and 991.2 chassis

Specifications

• Brand: Bull Boost
• Part type: Exhaust part
• Chassis: 991, 991.1, and 991.2

Fitment for the Porsche 911

Listed for the Porsche 911. Check your year, model and trim against the title before you order.

What it does

Exhaust parts carry gases away from the engine, quiet the sound and clean up emissions. Exhaust parts carry gases away from the engine; replacing rusted or restrictive parts fixes leaks and noise, and performance designs can add flow and sound.

Installation & tips

• Check local noise and emissions rules, and use new gaskets and hangers when you fit it.
• Clamps and hangers: Old hardware is usually rusted.
• Gaskets: New gaskets prevent leaks at each joint.
• Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.

FAQ

Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.

What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.

Before you order

• Confirm your year, make, model and trim match the fitment listed above (Porsche 911).