re-rx7
Ruck the night away
- Joined
- May 24, 2015
- Threads
- 17
- Messages
- 783
- Reaction score
- 364
- Location
- Gainesville, Tx
- First Name
- Brandon
- Vehicle(s)
- 19 5.0
Good post. I've been wondering this exact thing. Oe mufflers are gd its the OE suitcase resonator that is restrictive.As a bit of a side note here ... I recently did a before/after test w/a Borla exhaust system (140745) on my 2019 GT. While the system comes w/the X-pipe, I did not care for the upper RPM sound so I installed the Borla resonator (60661) before taking the 2nd reading. With the OE system, the best reading was 426 HP. With the Borla + resonator, the best reading was 443 hp. The published figures are all over the place regarding the exact HP loss w/the resonator v. the X-pipe, but it's safe to say that I did sacrifice some HP by opting out of the X-pipe. In hindsight, I learned two (2) things: 1) the 2019 OE system is pretty darn good w/the major 'drawback' (in terms of HP) being the pre-muffler, not the rear mufflers & 2) if I knew then what I know now, I would have merely replaced the OE pre-muffler w/the Borla resonator (60661).
Sponsored