Go for Blackwing. Presenting the AWE SwitchPath™ Catback Exhaust for the CT4-V Blackwing: Dual 3” valved catback configuration Features AWE’s patented drone-canceling solution, 180 Technology® Dyno-verified gains of +3 hp & +12 lb-ft of torque at the wheels Utilizes factory valve motors to retain all factory drive mode valve functionality Bespoke X-pipe for refined, rasp-free tone Mid-pipes feature bullet-style resonators Signature 4.5” double-walled, slash-cut tips available in chrome silver and diamond black Handcrafted from CNC mandrel-bent, U.S.-sourced .065”-wall T304L stainless steel Less is more: clean, straight-through design maximizes performance Pure bolt-on, no-cutting required Perfect Fitment guarantee AWE No CEL guarantee Lifetime Warranty