2.5" Catless Downpipe Exhaust For 2008-2013 INFINITI G37 3.7L V6 Cylinder | Suncent®

2.5" Catless Downpipe Test Pipe Exhaust for INFINITI G37 Q50 Q60 & Nissan 370Z 3.7L V6

Upgrade your exhaust system with the SuncentAuto 2.5" Catless Downpipe Test Pipe Exhaust, designed for select INFINITI G37, Q50, Q60, and Nissan 370Z 3.7L V6 models. Built from durable T-304 stainless steel with a mirror-polished finish, this performance test pipe downpipe helps improve exhaust flow, reduce restriction, and deliver a deeper, more aggressive exhaust tone. If you are new to exhaust modifications, check out our guide on what is a downpipe to learn more.

Key Features & Benefits

Durable T-304 Stainless Steel Construction

T-304 stainless steel boasts excellent heat resistance and corrosion resistance, enabling it to withstand the high temperatures and moisture erosion of the exhaust system for extended periods. It is resistant to rust and cracking, extending its service life far beyond ordinary steel test pipes.

Mirror Polished Finish

The inner walls are mirror polished, resulting in an extremely smooth surface that significantly reduces frictional resistance in the exhaust airflow while enhancing oxidation resistance. Furthermore, it gives the exhaust system a clean, high-performance appearance, improving the visual appeal of the engine bay.

Improved Exhaust Flow & Direct Test Pipe Design

The original three-way catalytic converter generates significant exhaust back pressure. This downpipe exhaust features a direct-flow catless downpipe design that functions as a high-flow test pipe, allowing exhaust to flow more smoothly and improving engine breathing efficiency. Compare options in our catted vs catless downpipes breakdown.

Boosted Horsepower and Torque

With reduced exhaust back pressure, the engine can "breathe" more efficiently at high RPMs, resulting in more complete combustion. In actual driving, this translates to noticeably lighter acceleration in the mid-to-high speed range, with a perceptible increase in wheel horsepower and torque.

Reduces Exhaust Temperature (EGT) by 100°F to 200°F

Catalytic converters accumulate a significant amount of heat. After removing factory converters and replacing them with this catless test pipe, exhaust can be directly discharged, resulting in faster system cooling. Under full throttle or sustained high load conditions, exhaust gas temperature (EGT) drops by an average of 100–200°F.

Improved Fuel Economy

By reducing exhaust back pressure, the engine spends less energy pushing exhaust gases out during the exhaust stroke. This lowers pumping losses and improves thermal efficiency, resulting in a 3–5% fuel economy gain.

A Powerful Exhaust Sound

The straight-through test pipe style design helps create a deeper, louder, and more performance-oriented exhaust note, ideal for drivers seeking a more responsive and exhilarating driving experience. Read more on downpipe vs straight pipe differences.

Why Choose SuncentAuto?

Direct-install design: Perfectly matches compatible vehicle applications, including G37 test pipes, Q50 downpipes, Q60 downpipes, and Nissan 370Z test pipes setups, supporting easier installation.

45-day risk-free returns: Not suitable? Not satisfied? Easy returns.

Fast and free shipping within the US: No hidden fees.

Customer support: Need help confirming compatibility or installation details? SuncentAuto's support team is always ready to assist you before and after sales.

Promotion: New users enjoy a 10% discount on their first order, add to cart now!

Join thousands of satisfied VQ owners: Don't take our word for it. Real buyers say "Perfect fit for my Q60" and praise "My 370Z sounds amazing now with these test pipes." Based on real owner experiences, it received a high score of 4.59/5.