Nitto Or Mickey Thompson Drag Radials
Traction is the name of the game with drag radials. Air down the tires according to the manufacturer's guidelines, do a good burnout, and enjoy serious hookage. Nittos work well for cars that see a lot of daily driver miles, and will last longer. The Mickey Thompson drag radials will wear out a lot faster but will win a Pepsi challenge on which drag radial hooks hardest.
| Price: | $400 for two |
| Gain: | N/A |
| Performance: | .3 e.t. reduction and 1 mph gain |
| Install difficulty: | Easy for the tire guy |
Under $800
Holley Stealth Ram Intake Manifold
While the stock TPI intake manifold is out of breath around 4,500, the Holley Stealth Ram intake manifold can help an internally stock engine pull clean to 6,000 rpm. Gains of 20 rwhp or more make this a must-do mod. You'll need a set of Holley's fuel rails to complete this mod, and a set of new valvesprings are also recommended.
| Price: | $530 with fuel rails |
| Gain: | 20 rwhp |
| Performance: | .2 e.t. reduction and 2 mph gain |
| Install difficulty: | Medium |
Nitrous Oxide Systems Wet Kit
A long time favorite of the TPI crowd, this nitrous setup features a spray bar plate that mounts between the throttle body and the plenum. Gains are around 100 rwhp, with e.t. reductions of close to a second. As said before, nitrous is a demanding mistress and must always get a lot of attention. Make sure to run colder spark plugs and have a dependable fuel system.
| Price: | $549 |
| Gain: | 100 rwhp |
| Performance | .3 e.t. reduction and 1 mph gain |
| Install difficulty: | Hard, unless you have wiring skills |
Precision Industries Torque Converter
Precision Industries' Vigilante line of torque converters has your TPI engine covered. Their single-disc lock-up converters have helped propel many a bolt-on TPI car into the 13s and 12s. Most TPI experts suggest a 2,800 stall speed for an internally stock TPI. While on the more difficult end of the scale for the DIY'er, this is a mod that can be done in an afternoon-or in about two hours by a professional.
| Price: | $699 |
| Gain: | N/A |
| Performance: | .3 e.t. reduction and 1 mph gain |
| Install difficulty: | Hard |