RR Racing is proud to introduce the best sounding and most versatile RCF exhaust on the market for the IS500 platform!. We know there are other “valvetronic” exhaust on the market, but having heard those systems, and considering their astronomical $5000+ pricetag, we decided to design and build our own system that sounds better, and is more affordable! In “Bazooka” mode, our IS500 Valvetronic Exhaust is race-car loud, bringing out the full sonorous glory of the IS500's 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 RCF 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 welding, 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. Power gains are similar compared to most 2.5” dual cat-less Lexus V8 exhausts such as RCF, or about 25hp measured at the wheels. Additional gains are attainable when pairing this exhaust with PPE headers. The following video compares loud and quiet modes on Lexus GSF (similar sound on Lexus IS500): 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. 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.