??? ------------------ 1989 Iroc-Z L98 Original engine-58K miles!! SLP 1 3/4 SS headers, Hooker Areochamber catback, no cat, BBK AFPR, 3.8L Turbo V6 200* fan switch, MSD GM coil, ported and gasket matched plenum, TB coolant bypass, relocated MAT sensor, screenless MAF sensor, K&N filters, Accel cap and rotor, Taylor SpiroPro 8mm wires, Bosch Platinum plugs, Mobil 1 oil, and more to come... Best ET not corrected- 14.24@96.76MPH / 2.17 60ft on street tires with the crappy B/W 2.77 gears. Homepage currently under construction: http://www.iit.edu/~wicktho/len

As far as I know one costs $20 and the other is $9. I got the $9 one and it looks like the stock one but I didn't see the $20 since they didn't have it in stock?

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1989 Iroc-Z L98 Original engine-58K miles!!

SLP 1 3/4 SS headers, Hooker Areochamber catback, no cat, BBK AFPR, 3.8L Turbo V6 200* fan switch, MSD GM coil, ported and gasket matched plenum, TB coolant bypass, relocated MAT sensor, screenless MAF sensor, K&N filters, Accel cap and rotor, Taylor SpiroPro 8mm wires, Bosch Platinum plugs, Mobil 1 oil, and more to come...
Best ET not corrected- 14.24@96.76MPH / 2.17 60ft on street tires with the crappy B/W 2.77 gears.

Homepage currently under construction: http://www.iit.edu/~wicktho/len

One is probably for the fan switch located in the cylinder head, and the other is probably for the coolant temp gauge in your ****pit, this sensor is located on the intake manifold. Hope this helps,

Jason