02 sensor spacer for 04 XC70 with CAT codes
 

Hello, Can anyone tell me which spacer I need to buy for my CAT? I installed an aftermarket and am throwing code P0420. I've seen some say I need a straight spacer and others a 90 degree spacer. Thanks in advance!

either should work, the idea of a CEL-BOSS (like the one sold on the IPD site) is to move the sensor out of the direct exhaust stream - which should be just enough to not trigger a code.