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4/4/2015 | Yakima Dirt Track - Yakima, WA Summer Thunder Sprint Tour at Yakima Fairgrounds 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Sprint Cars, B Modifieds, Vintage Modifieds | Results | Michael Bollinger (360 Sprints - Winged) | 7th | - | 11th | - | Michael Bollinger (Sprint Cars) | 7th | - | 11th | - |
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4/18/2015 | Skagit Speedway - Burlington, WA 2015 SEASON OPENER! Dwayne Lane Auto Centers Racing Series A Modifieds: Washington Modified Tour 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, Vintage Modifieds, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 4th | - | - | 11th |
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5/2/2015 | Skagit Speedway - Burlington, WA Summer Thunder Sprint Series presented by Here 2 Wire & Finishline Graphics 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Sprint Cars, Midgets, A Modifieds | Results | Michael Bollinger (360 Sprints - Winged) | 6th | - | - | 11th | Michael Bollinger (Sprint Cars) | 6th | - | - | 11th |
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5/9/2015 | Skagit Speedway - Burlington, WA ROUND FOUR Dwayne Lane Auto Centers Racing Series / Sedro Woolley State Football Championship Night 410 Sprints - Winged, Sportsman Sprints, Street Stocks, Hornets | Results | Michael Bollinger (410 Sprints - Winged) | 4th | - | - | 5th |
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5/16/2015 | Skagit Speedway - Burlington, WA ROUND FIVE Dwayne Lane Auto Centers Racing Series A Modifieds: Washington Modified Tour 360 Sprints - Winged, Sportsman Sprints, Vintage Modifieds, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 8th | - | 1st | 13th |
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5/23/2015 | Skagit Speedway - Burlington, WA JOHN CARROLL CLASSIC presented by IRI & HUGE FIREWORKS SHOW! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 7th | - | - | 9th |
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5/30/2015 | Skagit Speedway - Burlington, WA ROUND SEVEN Dwayne Lane Auto Centers Racing Series 360 Sprints - Winged, Midgets, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 4th | - | - | 8th |
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6/6/2015 | Skagit Speedway - Burlington, WA ROUND EIGHT Dwayne Lane Auto Centers Racing Series A Modifieds: Washington Modified Tour 410 Sprints - Winged, Sportsman Sprints, Vintage Modifieds, Hornets | Results | Michael Bollinger (410 Sprints - Winged) | 3rd | - | - | 4th |
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6/13/2015 | Skagit Speedway - Burlington, WA ROUND NINE Dwayne Lane Auto Centers Racing Series / Janicki Employee Night 360 Sprints - Winged, Sportsman Sprints, Street Stocks, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 4th | - | - | 7th |
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6/25/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series | Results | Michael Bollinger (360 Sprints - Winged) | 4th | - | 18th (DNF) | - |
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6/26/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series Midgets | Results | Michael Bollinger (360 Sprints - Winged) | 5th | - | 10th | - |
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6/27/2015 | Skagit Speedway - Burlington, WA Jim Raper Memorial Dirt Cup 360 Sprints - Winged: ASCS National with Summer Thunder Series, Summer Thunder Sprint Series A Modifieds: Washington Modified Tour Vintage Modifieds | Results | Michael Bollinger (360 Sprints - Winged) | - | - | 10th | - |
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7/11/2015 | Skagit Speedway - Burlington, WA LES SCHWAB TIRES MIDSEASON CHAMPIONSHIPS & HUGE FIREWORKS EXTRAVAGANZA! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, A Modifieds, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 1st | - | - | 3rd |
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7/24/2015 | Skagit Speedway - Burlington, WA BOB'S BURGERS & BREW SUMMER NATIONALS | Preliminary Night 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 4th | - | 11th | - |
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7/25/2015 | Skagit Speedway - Burlington, WA BOB'S BURGERS & BREW SUMMER NATIONALS FINALE 360 Sprints - Winged: Summer Thunder Series with Summer Thunder Sprint Series Midgets, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | - | - | 7th | - |
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8/15/2015 | Skagit Speedway - Burlington, WA Skagit 12 and Skagit Seahwkers Night! / Fastenal Employee Night/ Burned Children Recovery 360 Sprints - Winged, A Modifieds, Street Stocks, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | 5th | - | - | 5th |
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9/19/2015 | Skagit Speedway - Burlington, WA SCRAP-IT SEASON CHAMPIONSHIPS & HUGE FIREWORKS SHOW! 360 Sprints - Winged, 410 Sprints - Winged, Sportsman Sprints, A Modifieds, Hornets | Results | Michael Bollinger (360 Sprints - Winged) | - | 2nd | - | 3rd |
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