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BimmerWorld Sweeps Pro-Am and Am Classes at the Lonestar Enduro at COTA

The 2025 Pirelli GT4 America season’s only endurance event, the Lonestar Enduro at Circuit of The Americas, delivered three hours of intense competition – and when the dust settled, it was a double class victory for BimmerWorld. COTA’s 20-turn, 3.4-mile circuit provided the perfect stage for the No. 82 Red Line Oil / Lifeline Fire & Safety Systems USA and No. 36 OPTIMA Batteries BMW M4 GT4 entries to sweep the Pro-Am and Am categories.

Behind the wheel at the start and after a cool morning qualifying which saw the BMW cars in the field struggle for pace, James Walker, Jr. started 20th overall in the No. 82 BMW, and James Clay’s No. 36 BMW was 23rd on the grid. From the drop of the green flag, both BimmerWorld cars were on the move. Clay quickly jumped up six spots to 17th in the first lap, while Walker Jr. fought hard in a hectic midfield battle.

An early full-course yellow to clear debris bunched the field, and both BimmerWorld drivers maintained their positions through the restart. Another caution soon after provided the perfect opportunity for both cars to execute their first driver changes, while the field pitted across a span of laps, dictating team strategies for the duration of the three hour race. Clay handed off to Charlie Postins, and Walker Jr. swapped seats with Tyler McQuarrie.

Postins restarted in 5th and immediately began moving forward, climbing to 4th as he made strong, decisive moves. McQuarrie, meanwhile, also pushed through the field, moving into the top five. As pit strategies unfolded, Postins climbed to second overall, while McQuarrie continued his charge – making a brilliant move up the inside of the No. 23 Porsche at Turn 20 to take 3rd, then advancing to 2nd as the race progressed.

The No. 82 was assessed a 2.10-second short pit penalty, which was cleanly served at the next stop without losing their lead. Meanwhile, Clay stormed back to the front, also taking over 1st place in Am as other teams executed their final stops.

A DRAMATIC FINISH: TYLER AND CHARLIE HOLD THE LINE

Both BimmerWorld cars held a commanding lead in the final stint, but a late full-course yellow with just under 30 minutes remaining eliminated the gaps that provided a safe buffer, and set the stage for a thrilling sprint to the finish. Both BimmerWorld BMWs were now leading their respective classes, but with hungry competitors stacked up immediately behind them.

On the restart with 12 minutes to go, McQuarrie expertly defended his lead, navigating traffic and placing Silver class cars between himself and his nearest rivals. Thanks to a scrum for second, he managed to create a gap, extending his lead and controlling the pace in the closing laps.

Postins also fended off heavy pressure from behind, using the tire life he had smartly conserved earlier in the race to maintain his lead. Postins later explained his tire strategy, “So everything was going well at that point, and I saved some tires for the end just in case I needed it. And during that dog fight, we had tires. And combined with our PFC brakes, which were superior in the field, we had the car we needed to win.”

When the checkered flag flew, it was 1st place for both BimmerWorld cars:
1st place Pro-Am – No. 82 Red Line Oil / Lifeline BMW (Walker Jr. / McQuarrie)

1st place Am – No. 36 OPTIMA Batteries BMW (Clay / Postins)

Up Next: Sebring International Raceway
The Pirelli GT4 America season continues May 16 –18, 2025, at Sebring International Raceway. We’re excited to carry the momentum from COTA into the bumpy, challenging concrete of one of America’s most historic racetracks.

The BimmerWorld Racing team is supported by the following sponsors:

No. 36:

OPTIMA Batteries – The Ultimate Power Source. Unbeatable starting power, light weight, superior cycling capability, and extreme resistance to the most common causes of battery failure make the OPTIMA Battery our choice for our own BMW and support vehicle fleet. OPTIMA also delivers the innovative OPTIMA Digital 200+, 400+ and 1200+ Battery Chargers for all automotive and marine batteries.

Lifeline Fire & Safety System – Leading manufacturer of fire safety equipment and safety components to the motorsport industry. Lifeline is the factory supplier for fire systems and rain lights for the BMW GT4 cars we race.

No. 82:

Red Line Synthetic Oil Corporation – Manufacturers of more than 100 high-end lubricants that have the reputation of performing better than any other product on the market, regardless of price. Using cutting edge technology and premium raw materials, Red Line responds to the technical challenges of today’s performance industry utilizing knowledge gained from racing to create high-performance products for track cars and street vehicles alike.

Lifeline Fire & Safety System – Leading manufacturer of fire safety equipment and fire safety components to the motorsport industry. Lifeline is the factory supplier for fire systems and rain lights for the BMW GT4 cars we race.

Core BimmerWorld technical partners include:

PFC Brakes – Leading brake friction and component manufacturer.

Diffsonline – Provider of differentials and driveline expertise to meet the demanding needs of customers, from street machines to professional race teams.

Additional team sponsors include:

Exhall Automotive – Offers bespoke design realization services to OEMs and Startups alike. With over 20 years of experience in many of the top design studios of the world, Exhall Automotive excels in offering efficient design services in a turn key fashion to meet the demands of today’s cost conscious manufacturers.

Johnstone Supply – The top cooperative wholesale distributor in the country and a recognized national leader in the HVACR industry.

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ABOUT: BimmerWorld is renowned as a leader in BMW aftermarket and tuning expertise, with operations spanning from stock, aftermarket, performance and racing parts sales and development through racing from club to professional levels. BimmerWorld Racing currently campaigns a pair of BMW Motorsport M4 GT4 cars in North America in the SRO GT4 America Championship, where the Virginia-based outfit is a frequent winner and championship contender.