ah ok. yea cause i was reading about it and it was saying that the 99 p11 has the 4 wire o2 sensor while the 95-97s have the 3 wire. and the b14 sensor is a 12mm while the p11 is the 18mm. I looked at the sensor I bought for a 95-97 and its not skinny, its just a smaller thread size. Even if i had to, I have the 12mm bungs for it.