That_Titanium_4RNR
New member
Thanks for the kind words.
Just to clarify, the URD Y pipe does not require an O2 sensor sim or spacer. The Doug Thorley long tube headers will require an O2 sim or spacer.
URD sells an O2 sim for the 4.0 and a universal one for the 4.7L:
URD Rear Sensor Simulator UNIVERSAL - Underdog Racing Development
I got the URD universal O2 sim but also saw the following product posted in a similar thread inquiring about this exact same topic.
https://www.amazon.com/dp/B07QNJJQCT/ref=cm_sw_r_cp_api_i_0ZH4Cb1J2NJS1
Will tackle the DT long tube installation either next week or some time in June if time permits.
Depending on your location, keep in mind the car will not pass the sniffer test or visual inspection.
Any chance you would document that header install? You have brought good insight to things you have done thus far, and I would love to see what you have to say about this