Tom Boardman claimed victory in a controversial reversed-grid British Touring Car race at Knockhill.
Starting second, the Special Tuning Racing SEAT Leon driver attacked poleman Jason Plato (Chevrolet Cruze) in the opening stages.
Plato held firm against the more powerful turbo SEAT until Boardman hit the Chevrolet twice at the first corner, firing Plato into the barriers.
The incident brought out the safety car and Boardman slowed at the hairpin at the restart, causing a concertina effect that resulted in several cars clashing or taking to the grass. Worst affected was BTCC newcomer Aron Smith, who struck the back of Triple Eight Vauxhall team-mate James Nash and stopped on the track.
After another safety car period to clear up the mess, Boardman resumed in the lead. But the WSR BMW of Rob Collard got stronger and stronger as the race progressed.
The BMW applied intense pressure to Boardman, but the SEAT held on to win by just 0.197 seconds.
A little further back, Frank Wrathall's Dynojet NGTC Toyota Avensis took its second podium of the day, having forced a way past Tom Chilton's Arena Motorsport Ford Focus shortly after the second restart.
Honda pairing Matt Neal and Gordon Shedden also went by the Focus and fought a duel for the rest of the race. Shedden looked the quicker, but could not find a chink in the double champion's armour.
Mat Jackson seemed set to salvage good finish from a disastrous weekend as he charged up the field from the back, only to find more misfortune. After a great move at the hairpin to take seventh, he was chasing Chilton when bunching at the hairpin caught him out and he hit the back of the Focus. The damage was enough to put him out of the race.
That left Andrew Jordan's Eurotech Vauxhall Vectra to take seventh, from the Arena Ford of Tom Onslow-Cole and Nick Foster (WSR BMW).
Results - 27 laps:
Pos Driver Team/Car Time/Gap
1. Tom Boardman Special Tuning SEAT 26m09.236s
2. Rob Collard WSR BMW + 0.197s
3. Frank Wrathall Dynojet Toyota + 3.237s
4. Matt Neal Honda + 6.755s
5. Gordon Shedden Honda + 7.007s
6. Tom Chilton Arena Ford + 7.751s
7. Andrew Jordan Eurotech Vauxhall + 9.065s
8. Tom Onslow-Cole Arena Ford + 10.486s
9. Nick Foster WSR BMW + 10.646s
10 Alex MacDowall Chevrolet + 10.997s
11. Dave Newsham Special Tuning SEAT + 12.834s
12. Daniel Welch Welch Proton + 18.659s
13. Andy Neate Arena Ford + 23.592s
14. Jeff Smith Eurotech Vauxhall + 26.191s
15. James Nash Triple 8 Vauxhall + 27.228s
16 Liam Griffin Motorbase Ford + 33.909s
17. Chris James ES Chevrolet + 46.977s
Mat Jackson Motorbase Ford 21 laps
John George Tech-Speed Chevrolet 21 laps
Martin Byford AmD VW 20 laps
Rob Austin Rob Austin Audi 11 laps
Aron Smith Triple 8 Vauxhall 5 laps
Jason Plato Chevrolet 3 laps
Paul O'Neill Tech-Speed Chevrolet 1 lap