The new trend for today's automaker is starting to become more prodominantly about Power:Weight Ratio. When you weight reduce a vehicle the performace will drastically increase in almost every aspect; braking, acceleration, handling and even fuel efficiency. Toyota realized this potential with it's new line-up which included the Yaris. The Yaris's egglike appearance aids in the aerodyniamic efficiency of the vehicle and also seems to act as a disguise for the incredible potential within this lightweight chassis. Megan Racing has developed a series of parts for the Yaris to draw the most potential from this featherweight. With the development of the Damper System and the Axle Back, we have also developed a set of Equal-Length 4-1 Headers to give the engine a kick in power throughout the RPM range. An engine is a pump; to make that pump work more effectively you want to reduce restriction before and after the powerplant. These headers feature slightly larger primaries and smooth mandrel bends to increase the CFM of the exhaust manifold and allow the engine to "breathe" more effectively thus increasing power. - Smooth Mandrel Bends to Increase CFM - 4-1 One-Piece Design. - T-304 Stainless Steel - Direct Bolt-On - Hardware Included. - 1 Year Warranty