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Muffler Bypass Pipe with Adjustable Turndown
Fabspeed's Muffler Bypass Pipe deletes the heavy, cigar-shaped factory muffler on the Porsche 911SC 3.0L and 911 3.2L Carrera (1976-1989), along with any aftermarket rear muffler, for an immediate weight saving of 18-20 lbs (9kg) and a more aggressive flat-six sound. It's cat-back, so it stays 50-state emissions legal and works with the stock catalytic converter or Fabspeed's own high-flow cat and resonated pre-muffler pipe. An adjustable 90-degree turndown tip lets you dial in exhaust volume, and Fabspeed's dyno testing showed gains of 12hp and 9.6 ft-lbs of torque with improved throttle response. Built from 14-16 gauge CNC mandrel-bent T304 stainless steel, it's easy to install and just as easy to remove if you want to go back to quiet.
Frequently asked
Which cars does the Muffler Bypass Pipe with Adjustable Turndown fit?
Fits your Porsche 911 SC. Fabspeed lists this piece for: all Porsche 911 models worldwide 1976-1989 911SC 3.0L and 911 3.2L Carreras. Exact fitment for your year, trim and options is confirmed on your free consult before anything is ordered.
What does the price include?
The delivered price includes the part from Fabspeed USA, freight to Australia, import costs and GST. Enter your postcode to refine delivery; the final figure is confirmed on consult.
How long until it arrives?
Every Fabspeed part is made in-house at Fabspeed USA with about a one-week production lead time, then allow another 3-4 days for delivery to Australia via UPS. That freight is already included in the price.
Does this stay emissions legal?
Yes, it's cat-back and doesn't touch the catalytic converter, so it's street legal in all 50 states.
How much power does it add?
Fabspeed's dyno testing showed gains of 12hp and 9.6 ft-lbs of torque, along with improved throttle response.
Can I control how loud it is?
Yes, it includes an adjustable 90-degree turndown tip for exhaust volume control.
How much weight does it save?
18-20 lbs (about 9kg) versus the factory muffler.
Who installs it?
Rennen Motorsport in Adelaide, or an authorised dealer near you. Fitting it yourself may also be an option depending on the part, so raise it on your consult; professional installation is quoted separately.
Is it covered by warranty?
Fabspeed products carry the manufacturer's warranty, supported locally through Rennen Plus as the Australian principal. See our returns policy.
Can I just buy this outright, or do I need to talk to someone first?
Every enquiry, whether it's one part or a full build, starts with a free consult. We confirm the exact spec for your car before anything is quoted or ordered.
