Grayless Automotive and Performance

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Grayless Automotive and Performance

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ASE Master Certified 🛠️ | GM Specialists & Daily Repair | Home of the 3500hp Mainline HubPro Dyno 🏁 | Frankfort, IN 📍

General automotive repair, cam swaps, engine swaps, transmissions, differentials, A/C repair plus much more

06/03/2026

More boost incoming. 🔥
This 6th-gen Camaro ZL1 1LE came in for a DSX Tuning lower pulley install. Once it's buttoned up, it heads to Wisher Performance for the tune update.
Here's the simple version of what's happening: the lower pulley drives the supercharger. Make that pulley smaller, and the supercharger spins faster — which packs more air into the engine, which makes more power. The DSX double-bearing setup keeps everything reliable at the higher RPMs the smaller pulley creates.
You can't just slap a pulley on and call it done, though. The tune has to be updated to match the new boost level — fuel delivery, ignition timing, knock thresholds, the works. That's why this one's heading to Wisher when we're done.
This LT4 was already a monster from the factory. About to be a whole different animal.
If your supercharged Camaro, Corvette, or CTS-V is feeling like it could use a little more punch, give us a call. We do pulleys, cams, AuxJection, full builds, and everything in between.
📍 Grayless Automotive — Frankfort, IN
📞 (765) 357-4666
💬 Message us about your build

06/01/2026

Fresh transmission, fresh start. 🔧
This Silverado rolled into the shop needing a new transmission, and Braden got her buttoned up clean. Ready for another 150,000 miles.
Transmission work isn't the flashy stuff that gets shared on social media — but it's the kind of job that keeps your truck on the road for the long haul. Done right, it's done once.
A few things we always tell customers about trans issues:
🔧 If you feel slipping between gears, rough shifts, or a delay when you put it in drive — don't wait. Catching it early can be the difference between a fluid + filter service and a full rebuild.
🔧 Towing, hauling, and stop-and-go driving are hard on transmissions. If your truck works for a living, fluid changes at the recommended interval are cheap insurance.
🔧 We work on Chevy, GMC, Ford, Ram, Toyota — pretty much anything with a transmission. If you're not sure what's going on with yours, bring it in and we'll diagnose it.
Daily drivers, work trucks, weekend toys — we take care of all of them.
📍 Grayless Automotive — Frankfort, IN
📞 (765) 357-4666
💬 Message us or give us a call

05/29/2026

C7 Z06 build day at Grayless. Here's what went into it. 🛠️
When you're chasing real power out of an LT4, you can't just bolt parts on and hope for the best. The supercharged 6.2 is a great platform, but the factory fuel system runs out of headroom fast once you start making real boost. Every part of this build had to be planned to work with the next.
Here's the spec sheet on this Z06:
🔧 GPI (Gwatney Performance Innovations) custom cam — wakes up the LT4
🌀 Brian Tooley Racing valve springs — handles the new cam profile
💨 Kong Performance ported supercharger — moves significantly more air than stock
💉 Wisher Performance AuxJection — adds the extra fueling needed so the engine can actually use the boost it's making
🔌 ECM pinning — what Braden's finishing up in this video. The factory ECM doesn't drive the AuxJection injectors out of the box, so we pin in the additional injector control. This is where most shops tap out.
🎯 Custom tune coming next on our Mainline dyno
ECM pinning is the kind of work that takes deep knowledge of the platform. You've gotta know the harness AND the calibration to make it run right. Get one piece wrong and nothing runs. That's why builds like this don't go to every shop in town.
Where will she land power-wise? We'll find out on the dyno. But with this combo — ported blower, cam, AuxJection, custom tune — it's gonna be a lot.
Big shoutout to GPI, Kong Performance, Brian Tooley Racing, and Wisher Performance. The LT4 build community runs on these guys.
If you've got a C7 (Stingray, Grand Sport, or Z06) and you're thinking about waking it up, give us a call.
📍 Grayless Automotive — Frankfort, IN
📞 (765) 357-4666
💬 Message us about your build
🔧 LT/LS specialists — cam swaps, ported blowers, AuxJection, ECM work, custom tuning on our Mainline dyno

05/27/2026

She's not just pretty. She's about to be MEAN. 🔥
This C7 Z06 rolled into the shop for a serious LT4 build, and we're just getting started.
🔧 GPI () cam + Brian Tooley Racing valve springs
💨 Kong Performance ported blower
💉 Wisher Performance AuxJection
🔌 ECM pinning + custom tune
Each piece is dialed in to work together — that's what separates a real build from a bolt-on parts list. The Kong-ported blower moves a ton more air than the factory supercharger, the GPI cam wakes up the LT4, and the Wisher aux injection makes sure the fuel system can actually keep up with all that boost.
Power goal? We'll see where she lands on our Mainline dyno. But with this combo, it's gonna be a LOT.
Stay tuned — we'll be posting the build video and dyno results over the next week.
📍 Grayless Automotive — Frankfort, IN
📞 (765) 357-4666
💬 Message us to talk about your Z06 build

05/26/2026

SOUND ON 🔊 Which car won the hub dyno challenge? 👑
Six builds. One dyno. Full send.
Turbo spool, redline screams, and one absolute monster pull that had the whole shop yelling.
Drop your pick 1–6 in the comments 👇
Send this to whoever in your group chat thinks their car is the fastest 😏
📍 Grayless Automotive — Indiana dyno tuning & performance builds
📩 DM "DYNO" to book your pull

05/25/2026

Today, we remember.

Memorial Day isn't about sales, cookouts, or the unofficial start of summer.
It's about the men and women who never made it home — who gave everything so the rest of us could live free.

From all of us at Grayless Automotive, thank you to the families who lost someone, the brothers and sisters in arms who carry their memory, and the Hoosiers who answered the call.

We remember them today, and every day. 🇺🇸

05/24/2026

0.0233 seconds.

That's the closest finish in the 110-year history of the Indianapolis 500 — and we just watched it happen. 🏁

Felix Rosenqvist held off David Malukas in a photo finish at the 110th Running of the Indy 500 this afternoon, capping a wild race with a record 70 lead changes, a one-lap shootout, and Caitlin Clark commanding the drivers to start their engines.

The cars that finish at the front of a race like that aren't won on the last lap. They're won in the garage — tire pressure, brake balance, fuel strategy, every detail dialed in long before the green flag drops.

Your daily driver works the same way. The little stuff you stay on top of now is what keeps you off the shoulder later.

Hope every Hoosier had a good race day. 🇺🇸

Who'd you have your money on this year — did anyone call Rosenqvist?

05/22/2026

When the tuner tests his own beast. 🦇🔊

Caleb Wisher from Performance brought his personal Cadillac CT5-V Blackwing to Grayless Automotive for some precision dyno testing on our Mainline Hub Dyno.

Why use a Hub Dyno for a supercharged 6.2L V8?
Bolting directly to the hubs eliminates all tire slip and traction issues. No strapped-down roller inconsistencies—just dead-accurate, repeatable horsepower and torque data for high-performance tuning.

Listen to that supercharger scream. What do you think this Blackwing put down to the hubs? Drop your guess in the comments! 👇

Need dead-accurate numbers for your build? Book your dyno session at Grayless Automotive in Mulberry, Indiana. Link in bio. 🔗

05/19/2026

Why is your 5.3 or 6.2 ticking?

⚙️ Meet AFM/DFM: Active and Dynamic Fuel Management deactivate cylinders at cruise to save gas — sounds smart, until those collapsed lifters take out a camshaft.

💀 The Tick of Death: That cold-start tick, misfire, or oil consumption isn't your imagination. It's a lifter on its way out, and once it goes, it takes the cam with it.

🔧 The Permanent Fix: An AFM/DFM delete + custom tune disables the system for good. No more lifter failures, no more wondering if today's the day. Done right, done once.

Got a 2007+ Silverado, Sierra, Tahoe, Suburban, Yukon, or Escalade with a tick? Don't wait for the rebuild bill — by the time the cam goes, you're looking at a teardown that costs 4x what the delete would have.

📞 Call Grayless Automotive & Performance: (765) 357-4666
📍 270 E County Rd 800 N, Frankfort, IN
🔧 ASE Master Certified | GM Specialists | 20+ Years Experience

📍 Frankfort, Indiana
📍 Clinton County, Indiana

05/18/2026

Leveling up this brand-new 2026 Silverado. 🛻📏

There is a massive level of trust involved when a customer hands over the keys to a truck that barely has any miles on the odometer. We love that our community trusts Grayless Automotive & Performance with their brand-new rigs right off the dealer lot.

This evening, we had this gorgeous black 2026 Chevy Silverado in the bay for a front-end leveling kit.

Why level a brand-new truck?

📉 Fixing the "Rake": Trucks leave the factory with the front end sitting noticeably lower than the rear (designed to level out when towing heavy payloads).

💪 The Stance: A leveling kit raises the front suspension to match the rear, instantly transforming the truck from a standard commuter to a tough, aggressive hauler.

🛞 Tire Clearance: It provides the crucial fender clearance needed to run those beefy, aggressive all-terrain tires without rubbing.

We got this rig up on the lift, knocked out the install, and got it back on the ground looking exactly how a truck should look.

Ready to get rid of that factory nose-dive? From leveling kits to full suspension lifts, we get your truck sitting right.

📍 Book your suspension upgrade: www.graylessautomotive.com

Address

Frankfort, IN
46041

Telephone

+17654901541

Website

https://graylessautomotive.com/

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