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Well, it's only a CT4-V Blackwing, but we were able to beat the fastest known CT5-V Blackwing's time last weekend at Darlington. Crank up your volume and enjoy the sweet sounds of this little V6!

We beat our own record by .03 second last weekend at Darlington.

We have all the CT4-V Blackwing carbon fiber pieces at roughly half of Cadillac's prices: https://www.tapouttuning.com/product-category/ct4-v-blackwing-performance-products/appearancessss/

Not that we are aware of. There hasn't been any reason to consider this yet.

@Mirza Grebovic told me they are the same strength. And so far, we haven't had any trouble with them, even with more than 300 horsepower above factory levels.

Yes, it's simpler, easier and more affordable to add 100 whp to the CT4-V Blackwings than it is on the CT5-V Blackwings. This is because we can turn up the turbocharger generated boost through the tune. Here are some links to give you an idea of the most common performance packages...

I see a couple 9.93 @ 138 mph quarter mile pass time slips in there. That's exactly what I was looking for. Thank you!

Does anyone happen to have a link to their best time slip to date?

Who knows what the world's quickest and fastest CT5-V Blackwing is? Has anyone hit nines in the quarter mile with one yet?

Eventually yes. However, when we tried to order a CT5-V Blackwing driveshaft sample from Cadillac, GM had these on 'intergalactic backorder'. That's what I call it when they have no inventory nationwide, and no E.T.A. for backorders.

We purchased an OEM CT4-V Blackwing driveshaft and sent it The Driveshaft Shop two or three months ago. We haven't heard back from them yet, but I'm sure we will soon. Sorry this is taking so long...

I believe OnStar can check to see what DTCs were setting. From there, maybe you can point your dealership in the direction of whichever electrical circuit is having the problem. Good luck!

I agree. In fact, the stock tune runs RICHER than our aftermarket tunes.

You have all the same mods, so let's go!

Changing the blower and throttle body will NOT change the WOT fueling. However, on the cars we're tuning, we are leaning them out to some degree for the best combination of performance and reliability.

Let us know when you're ready to get started on the tuning. :)

Special thanks to =AZWVriQXDvBbRtJLxUk1_pIN1eVBEOrvDY8_qDpH2Ze4_RwxveGMsALsy3-NJsn_VUXUkHL1vewLF29RaN0WdT60_b1gA-8a-Mmp5CCwwJQLFutSUXnGU4HotgOxWIizeOQ&__tn__=-]K-R']HP Tuners...

If the problem disappeared when you increased the octane, that would convince me it's an octane based problem. I recommend trying one tank of fuel from each of the different brand gas stations in your area. And each time you can hear audible knock, LET OFF THE GAS IMMEDIATELY.

Yes, sir. We already have a full assortment of CT5-V Blackwing products, with nearly all in stock for immediate shipment. We did the world's first ever CT5-V Blackwing dyno tune for HP Tuners when the Global B E99 tuning was still in beta mode. And we have one in house right now for a...

Tapout Tuning is currently seeking a CT5-V volunteer who is interested in aftermarket downpipes. We will need to have your car for one week here in Ohio so we can finalize the design and ensure perfect fitment. When you pick up your car, it will have the first set of downpipes already...