Matt came in from Indiana with his 2023 CT4-V Blackwing to have our wildly popular Purple Belt Performance Package installed.  He ended up making 591 peak whp with E53 fuel in the tank, and should be well into the 600 whp range when he increases his alcohol content to somewhere in the E60 to E70 range.  That’s the sweet spot for these cars.  Below E60 we need to pull back boost and/or ignition timing.  And above E70 we can run into fuel system capacity issues.

Danny from Virginia brought his 2022 CT5-V Blackwing in for the PD3 camshaft package with fully automatic flex fuel.  Final results were 769 whp on pump gas and 818 whp on E60 fuel.  This car sounds like a monster with the Corsa exhaust system!

Do you have a 2025 CT4-V Blackwing and want to get it tuned by the best?  Are you looking to stay with EPA catted downpipes and still make monstrous gains of 150 to 190 whp across the entire powerband?  Don’t worry.  Tapout Tuning has you covered.

Brian drove in from New Jersey to up the ante on his 2025 CT4-V Blackwing with six-speed manual transmission.  He opted for our Purple Belt Performance Package with EPA catted downpipes.  You should have seen his smile coming back from the final test drive!

I took my 2022 CT4-V Blackwing to have the Blue Belt package installed. I live in southern Wisconsin and took the 7.5 hour road trip. They made it worth the drive. The owner Scott was friendly and easy to get in touch with. Jorge, the technician who installed the upgrades, was respectful and clearly enjoys working on the cars. Both Scott and Jorge were very knowledgeable and have been working on Cadillacs for a long time. The garage is clean and well maintained. Professional shop. I would recommend Tapout Tuning if you’re thinking about getting any upgrades to your Blackwing!