Engine performance relies on how much air/fuel mixture can enter and how much exhaust can exit the combustion chambers. Though it makes logical sense to maximize the engine’s performance using free flowing intake and exhaust designs. Car manufacturers are forced to outfit vehicles with quiet, restrictive exhaust components in order to comply to sound and emissions regulations. Not exactly ideal for performance and motorsport purposes.Our exhaust systems are designed to be a complete bolt-on unit which replaces the factory exhaust system while keeping the emission system intact. By utilizing a larger tubing diameter with smooth mandrel bends and a straight-thru glasspack muffler. Engine performance is improved while giving the vehicle a mellow yet sporty exhaust tone.Comprised of 100% T-304 stainless steel, Megan Racing exhaust components are designed to last the test of time and are protected with a 1-year warranty against manufacturer defects.Applications: – Lexus GS (GS300/GS400/GS430) 1998-2005Specifications & Features: – T-304 Stainless Steel – Direct Bolt-On – Inlet: 77mm ID – Tip: 113mm O.D. – 1-Year Warranty Against Manufacturer Defects – Closed Course, Off-Highway Use OnlyNOTE: All Megan Racing Exhaust and Suspension products are deemed for “closed course and off highway use only”– please check local laws regarding the modification of the exhaust systems by checking the vehicle code for your state. Many states are more stringent on exhaust modification laws and to pass SMOG. Please check your local laws.All Megan Racing exhaust system components will alter and affect the vehicle’s overall sound in pitch and volume. All to which is subjective in manner. Megan Racing will not claim responsibility and/or accept returns based on an individual’s personal preference.