Back in 2019, Michigan-based performance shop Katech released a video showing it boosting the supercharged 6.2L LT5 V8 engine from the C7 Corvette ZR1 to over 1,000 horsepower with relatively minor modifications. Now Katech is back with another video focusing on the beastly LT5 – except this around, the tuned Small Block in question is installed in a customer’s car.
The customer car in question features Katech’s Stage 3 tuning package for the C7 Corvette ZR1. The Stage 3 kit includes a ported supercharger with an aftermarket pulley, racing spark plugs, a 112mm Katech throttle body, CNC ported cylinder heads, a Katech Competition valvetrain, aftermarket pushrods, a Katech C5-R timing chain and much, much more. The owner of this car also ordered some other extras that are not usually included in the Stage 3 kit, including a full E85 conversion, a different aftermarket camshaft and American Racing long tube headers.
Despite this long list of engine modifications, Katech promises its Stage 3 kit retains a good amount of drivability and says it drives similar to a stock LT5 V8 in regular day-to-day driving. The customer car featured in this video is the most powerful C7 Corvette ZR1 the company has built thus far and makes just over 1,000 horsepower at the rear wheels. Katech has managed to squeeze over 1,400 horsepower out of the LT5 engine on its engine dyno, however that engine has not been installed in a car yet.
For those who may not know, Katech once built the V8 engines that powered Corvette Racing’s Le Mans-winning cars and still provides built Chevy V8 engines to teams in the Trans Am Series and for other motorsports disciplines. If there’s a shop Corvette owners can trust with their engine upgrades, it’s Katech.
Check out the video embedded below to learn more about the shop’s Stage 3 kit for the LT5 V8.