i got the rattling fixed, had to actually weld the oval flange to the lowest part of the hanger, the bolt wouldnt hold it there. the pipe doesnt flex enough. I have the Perrin CEL fix placed on the car and i installed it right. the code was a EXHAUST GAS TEMP CIRCUIT MISSING. Which is understandable because i unplugged it thinking the ECU didnt need it as the perrin website states.
But...... I have bigger problems.
The WRX will stall out on me now. Example: goin down the highway go from 5th to nuetral on an exit, the revs go low, boggle alittle and stall just like that. this same senario will happen if i take the car from WOT to nuetral in 2nd gear or higher. I took the car to two local mechs i know and they said the new system i have on the car isnt gonna work because my back pressure is to low, the exhaust runs so freely that the O2's are stuck on stupid, place my factory ECU in a type of fail safe mode (restricting power) and become so cold it shuts down Qoute Unqoute if you will. They said I have to place a cat back on the car which is currently catless. (gtspec header/ catless uppipe/ perrin down pipe/ HKS hi power). now those were just to mechs i know from a hyundai dealer, there not the boys that drive these rexs,
. . . . so if anyone has a better idea as to what i should do besides cut and weld into my new exhaust, please let me know!!!!!