This central muffler fits :
> All the 991
The sound of the 991 comes entirely from this central rear muffler. None of it comes from the lateral mufflers. This version with valves offers a range of sound going from very powerful with valves open to a sound similar to the original with valves closed. Our mufflers for the 991 can be adjusted on one side which makes them easy to adapt.
Our range also includes:
> A sport version without valves - (Reference : SCA 991 3 2)
Our exhausts all fit onto the original interfaces. By this we mean their entry, their outlet and their size are the same as those of the original part.
These mufflers fit straight onto the catalyser outlets.
On average it takes about 8 hours to fit, including the time it takes to remove the original exhaust. You will need to remove the rear bumper. You will find the air filters here too. We recommend that you take this opportunity to replace them with sport air filters.
It is preferable but not essential to use a car hoist as the original exhaust is fairly easy to remove. Remember that the bolts must always be tightened progressively across the whole set of bolts... When all is in place, tighten the clamp.
To ensure that our exhausts are fitted under the best conditions, a mounting kit including: gaskets, stainless steel bolts, stainless steel lock nuts, high temperature copper grease as well as the 2 straps, is included with the exhaust. We recommend using the copper grease on the bolt threads and the gaskets when fitting the exhaust.