Concept Performance

Concept Performance

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Concept Performance is an engine block manuacturer who provides dealers with an aftermarket LSX style aluminum block.

Concept Performance is an American Made aftermarket aluminum engine block manufacturer. We currently only provide dealers with Concept Performance's NEW LSR Aluminum Engine Block. It is the newest addition to the LS performance aftermarket products.

01/06/2026

One of my best friends right here man! No BS, no fake personality…he is who he is and we love him for that! Forever live The Reaper!

Photos from CIDHeads - Competition Induction Designs's post 12/23/2025

👀 LSR 🔥🔥🔥

Photos from TKM Performance's post 12/23/2025
Photos from Thompson Motorsports of TEXAS's post 12/23/2025
12/12/2025
12/10/2025

When we first met the Fleece brothers, they were operating out of a (VERY busy) 54x60-foot pole barn. 15 years later, you can’t miss their 225,000 square-foot facility on the north side of I-74 outside Pittsboro, Indiana. There, they build dyno-proven and championship-winning Freedom Racing engines, manufacture problem-solving parts for each of The Big Three diesels, and produce what is arguably the most successful line of drop-in turbochargers in the industry (“Cheetah”). Now, you can find their American-made, top-quality repair products and upgrades in over a dozen Witt Family NAPA auto parts store locations throughout Indiana, Michigan, and Ohio.

Additionally, today Fleece has formally announced its acquisition of Concept Performance, a premier manufacturer of aluminum LSR and LTR builder blocks. This means dedicated foundry locations will also now exist under the Fleece Performance Engineering umbrella.

10/02/2025

Can’t wait to see what you do with this bad boy! It’s been a journey for sure! Reaper SS

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Telephone

Address


Indianapolis, IN
46203

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm