Once upon a time concerns over exhaust emissions were non-existent, gas contained lead and even mom's Impala made 375 horsepower. But that was the past. Today's powerplants don't tolerate lead and are forced to make power with less octane and more environmental restraints. Dropping in a massive cam and high-rise intake manifold are not options for these computer controlled Chevy's. With a growing segment of today's Bow-Tie buffs investing in late model rides, speed parts have made their way into the mainstream hot rod scene now more than ever. It is for this reason that cutting edge manufacturers such as Borla, Granatelli Motor Sports and Holley Performance bring us smog legal speed parts, with bolt-on ease. Seeing as the basic design of the internal combustion engine has remained the same, we decided to do the work for you and figure out what makes power. The stock LS1 is virtually an untapped power machine. Our bone stock '02 Z28 traveled to Morgan Motorsports, in Reseda, California, where it produced a stout 304 rear-wheel horsepower, a number grossly exceeding Chevrolet's claims. With the '02 still connected to the dyno, we added a Granatelli MAF sensor, Holley Power Shot air filter and Granatelli Cold Air lid, which, all tolled, produced an astounding 19 rear-wheel horsepower in a matter of minutes. Through canyon carving and daily driving we noticed improvements in throttle response as well as fuel economy. The results that really count showed up at L.A. County Raceway, where the '02 picked up 3 mph in trap speed and shaved .15 of a second in the quarter. Our trick to unleashing power in this modern F-body was a modified Air/Fuel ratio and less restrictive intake path, which increased total air volume. While we sacrificed no reliability or driveability, we gained power and maintained 50-state smog legality. Tune in for Part II when we rock and rumble with a Borla Stainless Steel Exhaust, and 50-state legal shorty headers from Hooker. After popping the front clips on the airbox, we removed the factory air filter and replaced it with Holley's Power Shot filter for fitment purposes. After popping the front clips on the airbox, we removed the factory air filter and replace After ascertaining that the fit was good, we loosened the hose clamp around the throttle body. After ascertaining that the fit was good, we loosened the hose clamp around the throttle b We disconnected the mass air meter, air temperature sensor, and loosened the hose clamp connecting the meter to the factory box, the MAF meter can now be removed. We disconnected the mass air meter, air temperature sensor, and loosened the hose clamp co Remove the stock box. On '00 and newer F-bodies the 3/4" air hose connected to the stock box must be removed and plugged with the provided filter. On '00 and newer F-bodies the 3/4" air hose connected to the stock box must be removed and Remove the air temperature sensor grommet. Reinstall the grommet in the Granatelli lid, fitment should be exactly the same as the stock box. Reinstall the grommet in the Granatelli lid, fitment should be exactly the same as the sto Connect the accordion hose to the throttle body on one end and the Granatelli MAF meter to the other end, and secure with hose clamps. Connect the accordion hose to the throttle body on one end and the Granatelli MAF meter to Be sure that the arrow on the top of the meter points toward the engine. Reconnect the new Granatelli lid to the Granatelli meter, the fit requires no hose clamp. The fit is tight, so don't be afraid to use a little elbow grease. Fit the lid on top of the air filter at the same time. Reconnect the new Granatelli lid to the Granatelli meter, the fit requires no hose clamp. Plug the MAF meter and air temperature sensor to their respective locations. If your engine compartment now looks like this, you're done! SOURCES Granatelli Motor Sports 8-05/-486-6644 www.granatellimotorsports.com Holley Performance Products, Inc. 1801 Russellville Road P.O. Box 10360 Bowling Green KY 42102-7360 270-782-2900 N/A www.holley.com/ Morgan Motorsports, Inc. 18446 Hart St Reseda CA 91335 By Andrew Schear Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!