RR Racing is proud that this exhaust system became the bestselling, best sounding and most versatile GSF/RCF cat-back exhaust on the market. We know there are other “valvetronic” exhaust on the market, but having heard those systems, and considering their astronomical $5000+ price tag, we decided to design and build our own system that sounds better and is more affordable! This product is a full cat-back system, but it is also available in as an axle back bolt-on to OEM exhaust system for the GS F (see product GSFEXHA002). In “Bazooka” mode, our GSF/RCF Valvetronic Exhaust is racecar loud, bringing out the full sonorous glory of the GS F v8. The sound is absolutely addictive, much like the popular Borla exhaust, only louder. But as amazing as that sound is, we fully realize that there are times where a more civilized exhaust note is required, so we implemented 2 electronic valves that route the exhaust gases through secondary mufflers. With a push of a button on the remote-control key fob, your GS F will go from race car loud to quiet and drone-free in just a few seconds. Our Valvetronic Bazooka features high-quality stainless-steel construction with 2.5” diameter T304 stainless steel piping, Hand TIG welded, X-pipe for better exhaust scavenging and maximum hp gains and is 100% made in the USA. Our standard quad tips are 3.5” diameter carbon fiber, and are removable/replaceable in case of damage. The following video compares loud and quiet modes on Lexus GSF: Power gains are similar compared to most 2.5” dual cat-less GS F exhausts, or about 25hp measured at the wheels. Additional gains are attainable when pairing this exhaust with PPE headers and our ECU tune, or even our 670hp Supercharger kit! We strongly urge you to check your local laws as removal of catalytic converters may not be allowed in your state. Important Disclaimer RR-Racing cannot ensure the applicability of manufacturer's or third-party warranties after performing this modification. Likewise, RR-Racing does not provide any warranty, written or implied, to the engine or drivetrain of your vehicle. Additionally, certain optional tuning options, such as removal of check engine light (CEL) triggers may be illegal for road use. RR-Racing provides these ECU tuning services for vehicles used in racing and off-road purposes only. RR-Racing does not condone the removal of any emissions related device on vehicles used on public roads. By buying this products, you agree to the terms of this disclaimer.