Read our guide on exhaust headers vs exhaust manifolds for a better understanding. Make your vehicle stand out from the crowd with more performance, better sound, and great quality. Unlike most competitors, we have material options to best fit your environmental conditions and budget.

The goal is to design a system that sounds great, without adversely affecting performance. Refunds for returned products are issued with 3-5 business days once they are received by our warehouse and inspected. Refunds will be issued via the same payment method originally used to place the order (Credit Card, PayPal, Google, Affirm, Check). All returns, where JM Auto Racing is not at fault, will have 15% restocking fee less than cost of freight.

Catalytic convertors are also necessary due to internal combustion engines’ ridiculously low efficiency. All of the hydrogen and carbon in gasoline would entirely burn out and transform into carbon dioxide and water in an ideal, frictionless engine. Since this is not the case, cats are the only way to go when designing exhaust systems.

Thank you for your feedback, we will inform the developers and continue to improve our product. If you looking for cheap/reliable test pipes this is one of the best choices. He is a true motorhead at heart and loves writing, especially about engines and vehicular dynamics. This law is frequently enforced and we do our best to educate the public on traffic safety and equipment violations through education and enforcement. Local noise ordinances are common in many counties and cities.

Enhance your vehicle's performance with our expertly designed kit, crafted to deliver noticeable power gains and a refined driving experience. Whether you're looking to improve track times or simply upgrade your daily driver, this kit provides the quality and precision engineering you need to maximize your vehicle's potential. Trust RNJ Performance to provide the components that deliver both reliability and high performance, taking your vehicle to the next level. Both g37 test pipes Pipes and Downpipes, like the FLASHARK G37 Test Pipes and 370Z Downpipe, are designed to increase horsepower. By improving exhaust flow and reducing restrictions, they can add 10 to 20 horsepower on average, with noticeable gains during high-performance driving. Even though they’re called test pipes, that isn’t what they do in a substantial way.