Mass Airflow Sensor
The bolt-on
Granatelli Motorsports' Mass Airflow Sensor with cold-air tuning. $300
The mule
'02 Camaro SS fitted with a Volant cold-air kit and SLP Loud Mouth exhaust. Power measured at the rear wheels.
Our take
The increased airflow and performance calibration provided by Granatelli's MAFs improve power and throttle response.
Before
Max torque: 285 lb-ft @ 4,700 rpmMax power: 276 hp @ 5,400 rpmAverage torque: 243 lb-ftAverage power: 198 hp
After
Max torque: 302 @ 4,500 rpmMax power: 288 @ 5,450 rpmAverage torque: 277 lb-ftAverage power: 208 hp
Difference
+17 lb-ft+12 hp
Throttle Body
The bolt-on
A BBK 80mm LS1 Performance Throttle Body. $380
The mule
The Camaro with a Granatelli Mass Airflow Sensor.
Our take
You get more air in, you make more power.
Before
Max torque: 302 lb-ft @ 4,500 rpmMax power: 288 hp @ 5,450 rpmAverage torque: 277 lb-ftAverage power: 208 hp
After
Max torque: 317 lb-ft @ 4,450 rpmMax power: 304 hp @ 5,300 rpmAverage torque: 290 lb-ftAverage power: 218 hp
Difference
+15 lb-ft+16 hp