Porsche GT4: Where the Cayman Goes Racing Every Year—and 3 Teams to Watch in 2026

The Porsche GT4 platform in one paragraph

The 718 Cayman GT4 RS Clubsport is Porsche’s modern GT4 spearhead: mid-engine balance, customer-team serviceability, and a spec tuned for GT4 rulebooks around the world. Porsche’s own motorsport messaging emphasizes that it’s built to show up and compete—whether that’s short sprint weekends or longer enduros—without needing factory-team infrastructure.

The key championships Porsche GT4 is entered in every year

Think of Porsche GT4 participation in two big lanes:

1. Global / national GT4 championships (multi-make GT4 grids)
2. Porsche one-make series that include the Cayman GT4 (development-focused racing)

Here are the series where Porsche GT4 cars reliably appear every season—and what 2026 looks like in several of the major ones.

1) GT4 European Series (SRO) — the flagship GT4 battleground in Europe

If you want the “center of gravity” for GT4 in Europe, this is it: big grids, pro-am depth, and a calendar built around premier circuits. The 2026 calendar lists six rounds:

• Round 1 — Paul Ricard (France): Apr 10–12, 2026
• Round 2 — Monza (Italy): May 29–31, 2026
• Round 3 — Spa-Francorchamps (Belgium): Jun 25–27, 2026
• Round 4 — Misano (Italy): Jul 17–19, 2026
• Round 5 — Zandvoort (Netherlands): Sep 18–20, 2026
• Round 6 — Portimão (Portugal): Oct 16–18, 2026

Why Porsche fans care: the Cayman GT4 RS Clubsport is a staple entry here, and Porsche customer teams frequently run multi-car efforts across Silver/Pro-Am/Am structures depending on the year.

2) GT4 America (SRO) — the main U.S. GT4 championship

GT4 America is the U.S. home base for GT4 sprint weekends, with two-race round formats at many events. The published 2026 calendar includes:

• Sonoma: Mar 27–29, 2026 (Rounds 1 & 2)
• Circuit of the Americas: Apr 24–26 (Round 3)
• Sebring: May 7–9 (Rounds 4 & 5)
• Road Atlanta: Jun 12–14 (Rounds 6 & 7)
• Road America: Aug 28–30 (Rounds 8 & 9)
• Barber: Sep 25–27 (Rounds 10 & 11)
• Indianapolis: Oct 8–11 (Rounds 12 & 13)

Why Porsche fans care: GT4 America is often where you’ll spot a mix of experienced pros and rising amateur drivers building a résumé, and Porsche Cayman entries remain a familiar sight in multi-make GT4 paddocks.

3) IMSA Michelin Pilot Challenge — endurance-flavored GT4 racing in the U.S.

IMSA’s Michelin Pilot Challenge isn’t labeled “GT4” on the series nameplate, but the GS class is effectively the U.S. proving ground for GT4-spec cars (including Porsche Caymans in recent seasons).

The 2026 schedule page lists these events (10 rounds shown on IMSA’s schedule page), including two longer enduros (Daytona and Mid-Ohio):

• Daytona (Rolex 24 weekend): Jan 21–25 — 4 hours
• Sebring: Mar 18–21 — 2 hours
• Laguna Seca: May 1–3 — 2 hours
• Mid-Ohio: Jun 5–7 — 4 hours
• Watkins Glen: Jun 25–28 — 2 hours
• Canadian Tire Motorsport Park: Jul 10–12 — 2 hours
• Road America: Jul 30–Aug 2 — 2 hours
• VIR: Aug 20–23 — 2 hours
• Indianapolis: Sep 18–20 — 2 hours
• Road Atlanta: Oct 1–3 — 2 hours

Why Porsche fans care: IMSA GS racing rewards strategy and clean execution—perfect for customer teams with strong pit ops—and Porsche Cayman programs have proven they can win at the highest GT4-adjacent level in North America (including wins for outfits like Kellymoss with Riley).

4) British GT (SRO UK) — GT4 class racing with a distinct endurance identity

British GT always matters if you like mixed formats and classic UK circuits. The series confirmed a 2026 calendar and highlighted that the Silverstone 500 opens the season (and is the only 3-hour race on the 2026 slate).

Even when specific Porsche participation varies by team and year, GT4 is core to British GT, and Cayman GT4 entries have been common in recent seasons across the wider field.

5) ADAC GT4 Germany — GT4 on the DTM stage

ADAC GT4 Germany is a strong “next step” series for young talent, running alongside DTM weekends. ADAC’s 2026 announcement outlines a calendar that begins at Red Bull Ring and includes Norisring, Nürburgring, Sachsenring, and a Hockenheim finale.

• Red Bull Ring (Austria): Apr 24–26, 2026
• Norisring: Jul 3–5, 2026
• Oschersleben: Jul 24–26, 2026
• Nürburgring: Aug 14–16, 2026
• Sachsenring: Sep 11–13, 2026 (referenced in ADAC’s preview of the “crucial phase” at Sachsenring)
• Hockenheimring: Oct 9–11, 2026

6) Porsche one-make racing that includes the Cayman GT4

Porsche also feeds GT4 participation through its own ladder series:

• Porsche Sprint Challenge North America explicitly runs the 718 Cayman GT4 RS Clubsport alongside Cup cars.
• Porsche Sprint Challenge GB notes the championship welcomed the 718 Cayman GT4 RS Clubsport and is entering its 2026 season.
• Porsche Endurance Challenge North America (one-make endurance) announced a 2026 season with four rounds that run alongside Sprint Challenge weekends (Sebring, Sonoma, Road America, Road Atlanta).

This is why Porsche GT4 has such a wide “every year” footprint: even if a regional GT4 grid swings up or down, the Cayman keeps racing through both multi-make GT4 and Porsche one-make structures.

Top 3 Porsche GT4 teams to follow for the 2026 season

There are a lot of Porsche customer teams, but these three stand out as high-signal follows heading into 2026—because they’re active where the spotlight is brightest (Europe + North America), and they’re tightly associated with Cayman GT4 programs.

1) Kellymoss (with Riley) — North American execution you can trust

If you’re tracking Porsche GT4 stateside, Kellymoss is a must-follow. The team has already demonstrated top-end results in IMSA Michelin Pilot Challenge, including a season-opening win at Daytona in GS where the Kellymoss-with-Riley Porsche held off pressure to take victory. Why they’re worth your time in 2026: IMSA weekends are chaos-resistant racing—pit calls, traffic, cautions—and teams that repeatedly execute become perennial contenders.

2) Allied Racing — Porsche power in GT4 Europe

Allied Racing is a straightforward pick if your 2026 watchlist includes GT4 European Series. The team has run 718 Cayman GT4 RS Clubsport efforts in the championship, including multi-class attacks (Silver Cup and Pro-Am) highlighted in coverage of their Porsche-led program. Why they’re worth your time in 2026: GT4 Europe is deep; teams that commit across categories tend to learn faster, adapt setups quickly, and capitalize when weather and strategy scramble the order.

3) AV Racing — a GT4 Europe Porsche squad with consistent presence

If you want another GT4 Europe team to follow with clear Cayman identity, AV Racing is listed in the GT4 European Series ecosystem running the Porsche 718 Cayman GT4 RS CS across multiple car entries and driver lineups. Why they’re worth your time in 2026: in a six-round championship, consistency matters as much as raw pace—teams that keep showing up with solid lineups can quietly become title factors.

A simple way to follow Porsche GT4 all season long

If you want to keep your 2026 Porsche GT4 viewing organized, track these three “pillars”:

• GT4 Europe for the premier European sprint calendar (Paul Ricard → Portimão).
• IMSA Michelin Pilot Challenge for endurance-tinged, high-pressure GT4-style racing in the U.S.
• GT4 America for U.S. GT4 sprint weekends and a clean, easy-to-follow season arc.