Coming off Throwback/Alumni weekend for NASCAR at Darlington, Phil and Josh are here to discuss all three races at the track Too Tough To Tame. Tyler Reddick had to overcome multiple issues and the speed of Brad Keselowski to win his fourth race out of six to start the 2026 Cup Series season. The guys go over how he did so, other players and the points heading to Martinsville.

Justin Allgaier utilized a poor final pit stop by Kyle Larson's crew and a strong restart to win his second race of the season in the O'Reilly Series and add to his points lead. Corey Heim used new tires and overtime restarts to make it back to the front for his first Truck Series win of 2026, while teammate and replacement Kayden Honeycutt dominated. Phil and Josh do their reviews, provide their takes and give updates leading into Martinsville and Rockingham respectively.

A busy GSP Roundup covers IMSA at Sebring, NHRA, MotoGP/Moto2, Formula E, Supercross, World Superbike and Indy NXT before the guys come back together to make their picks for the Formula 1 Japanese Grand Prix, IndyCar at Barber and NASCAR Cup/O'Reilly at Martinsville. Josh lets us know all things going on in iRacing on the Sim Segment and Phil mentions his participation in a sim race at G-Force Racing Lounge before the usual social media updates.

Episode 307 of the Grip Strip Podcast discusses the latest results and key players in recent motorsport events across IndyCar, NASCAR, and Formula 1, while highlighting upcoming races.

• IndyCar at Arlington: Kyle Kirkwood wins; podium finishes by Alex Palou and Will Power.
• NASCAR Cup Series: Denny Hamlin takes the win; notable drivers include Bell, Byron, and Larson.
• NASCAR O'Reilly Series: Kyle Larson wins over Chase Briscoe; other notables include Allgaier, Gray, and Mayer.
• Formula 1 Chinese Grand Prix: Winner was AKA; Russell and Hamilton on the podium, with ongoing issues for Verstappen, among others.
• GSP Roundup includes highlights from WRC Rally Kenya, Indy NXT, IMSA 12 Hours of Sebring, NHRA, MotoGP/Moto2, and Formula E.
• Phil and Josh make their picks for the Darlington NASCAR Tripleheader before Josh's Sim Segment.

Per the phenomenon in current-day Formula 1, Phil and Josh return for E306 of the GSP to discuss and recap all the major motorsports events of the weekend.

• IndyCar's recent race at Phoenix with a Penske Pole/Win sweep, Rasmussen's almost win, Palou's issues, and points recap heading to Arlington.
• NASCAR's Cup and O'Reilly Series results from Phoenix with another Penske Pole/Win sweep, tire issues, Gibbs team pit call gone wrong, and plenty of yellows; Justin Allgaier gets around Jesse Love late to give JRM two consecutive wins with both series heading to Las Vegas
• Formula 1's Australian Grand Prix showcased a spirited battle between Mercedes and Ferrari, but George Russell showed up when it counted for pole and a race win. Phil and Josh go through other major stories heading to Shanghai for the first sprint weekend of the season.
• Other racing series mentioned include Supercross, F2/F3, Supercars, and NHRA, WRC, Indy NXT and F1 Academy with their respective upcoming races and highlights.
• Race previews and picks for F1, IndyCar, and NASCAR - plus Josh's Sim Segment provide additional insights for listeners.