Advance Headers are based in Adelaide Australia with have over 35 years of experience in the exhaust industry. All of their headers are interference design or Tri-Y which are best suited for standard or mildly modified engines revving up to 7,500 RPM.
This design gives much higher torque and horsepower figures than tuned type which work well in the mid to high rev range, e.g. 5,000 to 9,000 RPM. Advance Headers also manufacture a small range of tuned, 4 into 1 mandrel bent headers.