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Nan-peened valve springs provide long life
The factory intake kills any engine sound to meet requirements for everything but fun
Billet aluminum throttle body adapter with boost and vacuum reference point
we can compensate to make it start farther back in its travel
Inlet piping addresses system restriction
APR Catback Exhaust System Center Muffler | C7 S6 · S7 · RS7 D5 A8 4.0L Turbo V8 Nan-peened valve springs provide longThe APR Catback Exhaust System is available with and without a center muffler. This upgrade is customers who have purchased this system and would like to replace the center muffler with our straight pipe assembly. Features: T304 stainless steel construction Argon back purged TIG welding throughout Dual 2. 75" mandrel bent brushed tubing Rugged and precise mounting brackets Direct fit to the APR Catback Exhaust System Low profile design, suitable for
