KTR Performance

KTR Performance Performance Automotive shop specializing in GM late model & classic vehicles with precision tuning and reliable installations.

Lingenfelter & Magnuson approved installer. Engine development to advanced calibrations. Unleash your vehicles full potential.

06/02/2026

The LS6 with its new axle-back exhaust installed and finally back on the ground.

Some cars just keep getting better with time.

Our old C5 Z06 back on the lift at KTR.Now equipped with upgraded drivetrain components, refreshed suspension, improved ...
06/01/2026

Our old C5 Z06 back on the lift at KTR.

Now equipped with upgraded drivetrain components, refreshed suspension, improved cooling, and a new axle-back exhaust as the next phase of the build comes together.

It’s been great seeing the car continue to evolve with its new owner.

The next phase for this C5 Z06 is underway.Coilovers, upgraded steering wheel, Stage 5 transmission, Stage 3 differentia...
05/28/2026

The next phase for this C5 Z06 is underway.

Coilovers, upgraded steering wheel, Stage 5 transmission, Stage 3 differential, torque tube rebuild, upgraded cooling system, and a new axle-back exhaust — all aimed at making the car feel tighter, stronger, and more refined everywhere.

05/26/2026

Back at KTR!

This C5 Z06 used to be our shop car before being sold to the current owner — and now it’s back for the next round of upgrades.

Transported in with our enclosed trailer and headed straight into the shop for suspension, drivetrain, cooling, and interior refinements.

4-cylinder or V6 — there’s still plenty you can do.These 2021 and 2018 Camaros came in for performance-focused upgrades ...
05/21/2026

4-cylinder or V6 — there’s still plenty you can do.

These 2021 and 2018 Camaros came in for performance-focused upgrades tailored to each platform. Intake, exhaust, braking, calibration, and supporting mods designed to improve how the cars sound, feel, and respond.

With the right combination of bolt-ons and tuning, gains of 70–80 horsepower can be realistic.

Not every Camaro needs to be a V8 to be worth upgrading.

05/19/2026

FROM THE HUB.

Final Output: 612 WHP / 540 lb-ft

After a full inspection and proper calibration, this 2011 Camaro left running cleanly, driving properly, and putting down strong numbers on the dyno.

Good parts matter. Proper setup matters more.

If your build isn’t running the way it should, we’ll help you sort it out.

This 2011 Camaro came to KTR after the owner struggled to get the car running and driving properly.The vehicle already h...
05/14/2026

This 2011 Camaro came to KTR after the owner struggled to get the car running and driving properly.

The vehicle already had a supercharger, headers, and camshaft installed, but poor calibration left it stalling at idle and difficult to enjoy on the road.

Before any tuning began, we performed a full inspection of the previous work along with compression testing, leak down testing, borescope inspection, and fresh spark plugs to confirm the engine was mechanically sound.

Proper tuning starts with knowing the combination is healthy.

Once everything checked out, we calibrated the car on the dyno and got it running the way it should.

This 2023 Yukon owner was happy with the performance of the 3.0L Duramax, but wanted the SUV to handle better and sit ri...
05/12/2026

This 2023 Yukon owner was happy with the performance of the 3.0L Duramax, but wanted the SUV to handle better and sit right.

We installed a lowering kit to reduce center of gravity and minimize body roll while retaining the factory Mag Ride suspension system. A set of Vossen HF6-3 24x10 wheels wrapped in 305/35/24 tires completed the look.

The vehicle was then paint corrected and ceramic coated by Faucher Detailing, bringing out a deeper gloss and a cleaner finish that matches the rest of the build.

A sharper-driving Yukon with the stance to match.

Swipe to see the difference.This F-150 came back for our F150 Suspension Lowering Package along with a wheel and tire se...
05/10/2026

Swipe to see the difference.

This F-150 came back for our F150 Suspension Lowering Package along with a wheel and tire setup to completely change the stance of the truck.

The result is a cleaner profile, improved road feel, and a truck that looks as sharp as it drives.

05/07/2026

Here’s a closer look underneath this F-150 after installation of our lowering package, rear air bag assist system, and side-exit exhaust.

Built for better stance, everyday usability, and clean ex*****on throughout.

Address

46 Route 13
Brookline, NH
03033

Telephone

+16037698614

Website

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