Mass Air Flow Sensor Ends (MAF Ends) – $50 to ? – Replaces stock MAF ends and Maf screen with a ported set of MAF Ends that still utilize the original MAF Sensor. Please note that ported MAFs can respond unpredictably and have caused driveability problems in some cars. The stock MAF flows enough for 400+ hp so most bolt-on cars won’t need MAF upgrades.

1LE Elbow – Approx $70 – Replaces the stock unit with a smoother unit that does away with the silencer(the donkey dong on the bottom of the stock elbow).

Air Foil/Air Charger – $30 to $60 – Bolts to the front of the Stock Throttle Body to smooth out the airflow going into the intake.

Headers – $300 to Custom – Shorties include Hooker, Mac, Edlebrock, BBK, etc. and Longtubes include Hooker, FLP, etc. and custom setups from Kooks and other manufacturers.

Y-Pipes – $250 to Custom – Y-Pipes are generally included in Shorty Header systems but not always and are rarely included in Longtube Header systems. Y-Pipes are shaped like a “Y” and connect both header collectors to the I-Pipe which connects to the Muffler System.

Underdrive Pullies (Crank and Alternator) – $60 to $100 – These pullies are resized and replace the stock pullies allowing the motor to free up some lost HP that was formerly used to turn the accessories. The pullies free up HP by turning the accessories slower requiring less effort from the motor.
Manual Fan Switch – Free to $75- Used to manualy turn the radiator fans on and off when needed. TO do so for free, all you need is an automotive relay, switch, and some wire….10bucks at radioshack

Hypertech Power Programmer – ~$330+ – Used to lower fan activation temperatures, rev limiters, fuel curve, gear ratio’s, change in tire size, etc. Tunercat/LT1edit – An alternative to Hypertech that will allow you to manually adjust a larger variety of settings within the PCM.