Grayless Automotive and Performance

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Grayless Automotive and Performance Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from Grayless Automotive and Performance, Automotive repair centre, 270 E County Road 800 N, Frankfort, IN.

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

10/26/2026

CT5-V on the hub dyno. Guess the number before it shows up at the end.

Another dyno rental: the owner wanted to see what the tune actually makes. Wisher Performance did the calibration, we bolted it to the Mainline ProHub and let it pull. The screen at the end is the real run: 877.8 hp and 885.1 lb-ft.

How close was your guess? Tell us in the comments.

Curious what yours makes? Text us at (765) 357-4666 to book a dyno rental.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

10/24/2026

POV: your exhaust sounds like a tractor.

The pipe comes off the car and onto the bench, gets fit and tacked, then welded solid. A clamped joint can work loose and start leaking again. A weld stays put.

Braden's on the welder in this one. Sound on.

Heard your exhaust change lately? Tell us what yours sounds like in the comments.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

Someone welded this Camaro's exhaust straight to the old converters.That holds until a converter needs replacing. Then t...
10/23/2026

Someone welded this Camaro's exhaust straight to the old converters.

That holds until a converter needs replacing. Then there's nothing to unbolt, and the whole section has to be cut out to get at it.

So it got new catalytic converters and a converter and resonator combo, and we added flanges so the new setup bolts in line like factory. The first photo is the rusty originals next to the new set. The third is the flanged pipe on the bench before it went in.

Next time anything back there needs work, it unbolts. Done right, done once.

Exhaust sounding different lately? Tell us what yours is doing in the comments.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

10/21/2026

"Runs great. Just needs a little TLC."

Translation: nobody has looked under it yet.

The car looked clean. Two weeks later it's in a shop with a bill nobody planned on. We hear that one a lot around here.

Before you hand over the money on a used car, whether it's a dealer lot, Marketplace or a guy down the road, bring it to us first. We put it on the lift and go through it, then tell you what you're actually buying: what's solid, what's worn, and what's about to cost real money.

A pre-purchase inspection is $125, done by an ASE Certified technician. That's worth it on a $4,000 car, and worth it on a $40,000 one.

Nobody can promise a used vehicle will never give you trouble. What we can do is make sure you're not finding out about it after you've paid.

Shopping for a used car right now? Text us the make and model at (765) 357-4666 and we'll find you a spot on the lift.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666
🌐 graylessautomotive.com

That silver Chevy got a new transmission, a custom driveshaft, a new fuel pump and a diff build.Those aren't four separa...
10/18/2026

That silver Chevy got a new transmission, a custom driveshaft, a new fuel pump and a diff build.

Those aren't four separate repairs so much as one path: the transmission, the driveshaft and the differential carry everything the engine makes down to the pavement. Replace one and leave the others and the weak link just moves down the line. So the whole drivetrain got done together, and the fuel pump went in alongside it so the engine behind it is fed properly.

The first photo is the truck up on the lift. The second is the engine bay all of it hangs off.

Done right, it's done once.

Thinking about a drivetrain build on your own truck? Text us what you're running at (765) 357-4666 and we'll say where we'd start.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

We know our limits. 😅For the record, a turbo that's started whining louder than it used to is worth a look. That one we ...
10/17/2026

We know our limits. 😅

For the record, a turbo that's started whining louder than it used to is worth a look. That one we can actually help with.

Tag the friend who needs to hear this.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

Your A/C in August: ice cold. Your heater in October: who knows.Nobody tests the heater until the first cold morning, an...
10/16/2026

Your A/C in August: ice cold. Your heater in October: who knows.

Nobody tests the heater until the first cold morning, and by then everybody else is calling for the same appointment. If yours blows cool, this is the order we'd check, cheapest first.

Coolant level comes first. Low coolant means weak heat or none, and it costs nothing to look. Then the thermostat: stuck open, the engine never reaches temperature, so the heater never gets hot. Then the blend door, a small actuator that steers the air, which is the usual answer when one side is hot and the other is cold. The heater core comes last. Start there and a coolant top-off turns into a big quote.

Heater taking forever to warm up? Tell us what yours does in the comments.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

An ABS light on this Hummer H2 turned out to be a broken wire.That's the kind of fault a parts swap never finds. You can...
10/09/2026

An ABS light on this Hummer H2 turned out to be a broken wire.

That's the kind of fault a parts swap never finds. You can replace sensors all day and the light stays on if the break is in the wiring. So the wiring got diagnosed and repaired, and the circuit got tested rather than guessed at.

The H2 was in for more than that. We ran a parasitic drain test, did an A/C diagnostic and fitted a new A/C compressor, and made exhaust repairs. The meter is still on the fuse box in the second photo.

Test, don't guess. It's the cheapest way to fix a truck once.

Got a dash light you've been living with? Text us a photo at (765) 357-4666 and we'll say where we'd start.

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

10/07/2026

This Duramax threw a disco party.

If you run a 2011–2016 LML, you've probably heard the phrase. The factory CP4 fuel pump doesn't just stop working when it fails. It grinds itself apart and sends metal glitter through the fuel lines, the rails and the injectors.

This one already started dancing. So it's getting a CP3 conversion, a tougher Bosch pump, plus a disaster kit from Thoroughbred Diesel: new injectors, new rails, new lines.

Why all of it? Replace only the pump and the metal still in the system goes straight into the new one. Done right, done once.

Running an LML? Which year is yours?

📍 Frankfort, IN — 20 minutes from Lafayette
📞 (765) 357-4666

Compressor room's done, and it made a difference on day one.New compressor, new air lines, more capacity without expandi...
10/05/2026

Compressor room's done, and it made a difference on day one.

New compressor, new air lines, more capacity without expanding the footprint — one of those upgrades that never shows up in a photo of a finished car, but every job in the shop runs on air, so every job runs better for it.

Resolution General Contractors LLC handled the whole build-out. Clean work, nothing left for us to clean up after, done on the schedule they gave us.

📍 Frankfort, IN
📞 (765) 357-4666
🌐 graylessautomotive.com

Address

270 E County Road 800 N
Frankfort, IN
46041

Opening Hours

Monday 8am - 10pm
Tuesday 8am - 10pm
Wednesday 8am - 10pm
Thursday 8am - 10pm
Friday 8am - 10pm
Saturday 12pm - 5pm

Telephone

+17654901541

Website

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