ARK Performance Exhausts & Parts

The best cat-back exhaust for an Infiniti Q50 3.0T is one designed for that engine and chassis rather than a universal muffler — the ARK Performance GRiP cat-back here is built specifically for the 16-20 Q50 3.0T.

A cat-back exhaust replaces everything behind the catalytic converters: mid-pipe, resonators, and mufflers. It is the most common first power mod — freeing up exhaust flow, adding a deeper tone, and typically dropping weight versus stock without touching emissions equipment. Look for systems designed for your exact model and engine, and listen for drone at highway RPM before committing to an aggressive setup. Check your year and model, since pipe routing and flange positions differ between engines and body styles.

ARK Performance centers its catalog on complete cat-back exhaust systems, and its two signature series are both represented here. The GRiP series covers the Infiniti lineup — 16-20 Q50 3.0T, 07-15 G35/G37 sedan, 14-15 Q40, and 09-17 QX70 — while DT-S serves the 17-21 Civic Sport Hatchback and Civic Si sedan. The collection also includes ARK GT-S lowering springs for the 2017-2020 Q60 3.0T RWD. ARK's reputation comes from application-specific systems: each GRiP and DT-S exhaust is built around the routing and clearances of the car it fits.

Invidia is the Japanese exhaust specialist most Subaru and sport-compact owners know first — its N1, Q300, and R400 lines are fixtures of the WRX and STI scene. Like ARK, Invidia focuses on platform-specific systems with proven fitment, from track-oriented setups to quieter touring options.

Borla brings American exhaust heritage into the sport-compact and luxury space, known for its S-Type and ATAK series and stainless construction. Borla systems sit on the refined end of the sound spectrum.

Magnaflow Performance is the value-oriented counterpoint, famous for straight-through muffler design at friendlier prices. Its systems deliver the tone and flow gains of a cat-back without boutique-brand pricing, making Magnaflow a popular pick for daily drivers — read our guide on why upgrading your exhaust is worth the investment.

Shop the ARK systems directly: the GRiP cat-back for the 16-20 Q50 3.0T, the GRiP cat-back for the G35/G37 sedan and Q40, and the DT-S cat-back for the Civic Si sedan — or browse axle-back exhausts if you want sound without a full system.

Frequently Asked Questions

Will the ARK GRiP exhaust fit my Infiniti?

The Q50 system is for the 16-20 3.0T, with separate systems for the G35/G37 sedan and Q40, and the QX70. Check your year and model on the product page before ordering.

Do I need a tune after installing a cat-back?

No — a cat-back sits behind the converters and does not change airflow enough to need remapping, though a tune can unlock more gain with intake or downpipe mods later.

Will a GRiP or DT-S system drone on the highway?

ARK designs the GRiP and DT-S series with resonators to keep the tone deep without harsh drone, but every driver hears drone differently — noise-sensitive drivers may prefer a touring-style system.

How difficult is a cat-back install?

Most cat-backs are bolt-on with hand tools: unbolt the stock system from the converter flanges back and hang the new system on the factory hangers — a couple of hours on jack stands.