Tomei Expreme Unequal Length Headers - 15-21 WRX

Worth it!

Two experienced mechanical people took 4 in the driveway on jack stands. I now have the ej rumble from a fa motor. Forget about the naysayers that state a twin scroll needs even pulses. That's nonsense, my car runs better than ever especially in the upper band, plus my gas mileage has increased 10 %. Incredible!