on my ford raptor, and the guys at american racing headers , came to my rescue, and the headers that were on there were stainless works , not even there product, and fixed a bung, and also discovered that who ever did the install had the front drivers side front sensor, on the rear pass 02, and was giving a check engine light , holy cow, and they did it all for free, took about an hour and they were awesome, so next time i do headers,i am not walking i am running ,:rock:over to nick and his crew, thx again to those guy's for saving me.