3SX

3SXNAHDRLONGD-USA-CAT

3SX / Kooks 3SX NA Long Tube Headers + Hi-Flow Cat Non-Turbo DOHC 3000GT - QUALITY MADE IN USA!!!

Crankshafts

Fits Non-turbo DOHC NA Mitsubishi 3000GT
Direct replacement for factory manifolds and downpipe on all OBD-1 and OBD-Hybrid FED-spec engines (Fed-spec have only 1 O2 sensor just before main cat)
OBD-Hybrid CALI-spec and all OBD-2 require extending O2 sensor wiring and welding additioanl O2 sensor bungs on the header pipes (Cali-spec have 4 O2 sensors and 2 precats just after the stock manifolds), and may require addition of EGR pipe bung
Made in the USA with Stainless Steel
Gaskets (2) between headers-to-cat and cat-to-catback ARE included, gaskets between the heads (engine) and exhaust headers are NOT included

3SX has partnered with Kooks Custom Headers, located in North Carolina, to design the once-and-for-all ultimate long tube headers for the DOHC 24-valve Non-Turbo Mitsubishi 3000GT!!! We did it the right way and started with a WHOLE CAR! Kooks used their state of the art header design equipment to literally scan the engine bay and attachments so they knew exactly the space they were working with. These custom LONG TUBE HEADERS featuring 23-inch individual runners for each cylinder are designed to strengthen the car in the mid range and top-end. And they DO! The car pulls stronger and longer when pushed hard. We also included a flex-section to maintain flexibility once installed and mated to the rest of the exhaust system. The system was designed to have proper clearances and the best fitment of ANY non-turbo exhaust component on the market! A mockup was designed and tacked into place to confirm fitment and clearances, then the final product was cut and mandrel bent by computer-controlled equipment. Elaborate jigs were then made to ensure that EVERY set of welded-by-American-hands 3SX Long Tube Headers are exactly the same and meet both 3SX's and Kooks exacting standards! FED vs CALI Spec: The headers are set up for direct use on the FED-spec cars as the O2 bung is located at the back where the FED-spec single-sensor cars have the O2 Sensor. For installation on a CALI-spec car, you will need to weld additional O2 bungs onto the pipes and extend the wiring for the O2 sensors. Obviously, the header kit installed on a CALI-spec car will eliminate the two pre-cats as well, so it could possibly trigger the check engine light. NOTE: This modification may not pass local emissions or inspection laws - check your local ordinances.

Mitsuboshi Timing Belt
Nissan Quest Nickel Plated Double X227 - DA32
Mix me 2544