Best LT1 Bolt-Ons
Under $100
QTP Exhaust Cutout
For less than 50 bones, you can buy an exhaust cutout such as the QTP. By running an open 'dump' you can free up some horses without spending a lot of money on a catback. You will need to have this cutout welded into your stock exhaust, typically in front of the rear axle. Don't wear your Sunday best when opening it up, since you have to undo a few wing nuts underneath the car.
| Price: | $45 |
| Gain: | 12 rwhp |
| Performance: | .1 e.t. reduction and 1 mph gain |
| Install difficulty: | Hard, unless you have welded before |
March Underdrive Pulley
Another tried-and-true bolt-on, underdrive balancer pulleys free up horsepower while still charging the electrical system. While not too hard to install, hitting the final torque spec will take some muscle.
| Price: | $88 |
| Gain: | 5 rwhp |
| Performance: | .05 to .1 e.t. reduction and 1 mph gain |
| Install difficulty: | Medium |
Under $500
K&N Cold-Air Induction
While there are several notable air-induction manufacturers for the LT1, K&N is among the most popular and was frequently the best priced in our research. Expect between a one and two tenths drop in e.t., and a 47-percent increase in airflow. Installation is straightforward and should take about 10 minutes.
| Price: | $199 |
| Gain: | 15 rwhp |
| Performance: | .1 e.t. reduction and 1 mph gain |
| Install difficulty: | Medium |