just bought cali spec warpspeed y-pipe 4th gen and want to know wich O2 sensors to change? every time i look it up it says downstream left upstream right... I need Bank 1 sensor 1 and bank 2 sensor 2, but how to identify not a clue

please help orgers!!

 

The left side of the engine is the side towards the radiator. This is bank 2.
The right side of the engine is the side towards the firewall. This is bank 1.

The upstream sensor is close to where the y-pipe bolts to the exhaust manifold.
The downstream sensor is after the pre-cat or further away from the exhaust manifold.

 

CORRECTION BANK2 SENSOR1 AND BANK 1 SENSOR 1

so is Bank 1 sensor 1 upstream RIGHT
and bank 2 sensor 1 downstream LEFT

just don't wanna spend money on returning wrong number

 

Stop Toking and pay attention to what he said...you'll notice the orientation of the drawing was reversed. So if you're looking AT THE ENGINE from the DRIVERS SIDE FRONT TIRE, Bank 1 is on the right (firewall) bank 2 is on the left (radiator)

if what you said in your "correction" is correct, you want both upstream sensors...sensor 1 is always UPSTREAM. So you want both sensors that are before the precats.

 

Another reason to hate 99's!

 

fixed

 

Don't hate on us slower yet still sexy Cali Spec 99's.