Don't be fooled by others' claims that their product is superior to this 100% USA made part. We conducted all of our dyno testing at the same boost level for this part and others have not.
The KO Racing downpipe allows the use of the factory oxygen sensor and an extra O2 sensor port for putting a wide band O2 sensor into your exhaust for dyno tuning your fuel curve. The bung is for standard screw in type O2 sensors (M18x1.5), not the bolt on toyota type, and includes a plug. The downpipe is provided with new stainless hardware for the 3 bolt flange at the b-pipe connection, and new stainless studs for the (toyota) oxygen sensor port. The use of 2.5" pipe and large radius bends provide greatly improved flow. This results in a quicker spoolup on your turbocharger and more power throughout the RPM range.
This product includes a support bracket to eliminate concerns with cracking and comes with a 1 year warranty against defects. KO Racing designed the original downpipe support bracket that all other manufacturers have copied.
KO Racing recommends the use of a dead soft aluminum or copper reuseable gasket for the 3 bolt flange connection (like Percy's or Remflex -- you will need the 3" gasket).
*Note: this is not an emissions legal part. Use of the stock b-pipe may cause fitment issues between the exit of the downpipe, and the b-pipe flange.
*Note: Use of heat wrap on this or any ceramic coated part will void any warranty. Heat wrap causes an over-insulation on the outside of the pipe trapping too much heat in the metal itself making it brittle. Heat wrap also tends to trap moisture against the parts which can also lead to uneven heat distribution in the piece and lead to cracking. DO NOT USE HEAT WRAP WITH THIS PRODUCT.
See the installation instructions on the Technical Articles page.
Made to order: 2 to 4 weeks. May have them in stock, call to check if you are in a hurry for your order.