+ 11 hp & + 10 tq gain. - 2 3/4 tubing (70mm). - weighs 35.2 lbs (16 kgs) - German v2a - x5crni18-10 - 1.4301 stainless steel for improved durability. - does not interfere with emissions and will not trigger the check engine light. - includes block off plates & caps to use with either the OEM center muffler or an aftermarket center muffler bypass (with 2 inlets). - replaces the OEM valved side mufflers. Connects to OEM header and catalytic flange and connects to OEM center muffler or bypass. - can be used with bes99107060s1 for an even more aggressive growl. * please note - you will no longer have use of your valves ! Our 991 GT3 side muffler replacements are vastly different than the baffle plated mufflers stu...(choose a part on the right to read more)

Please call our office for availability.