The penultimate week of the 2015 O'Reilly Auto Parts Friday Night Drags season descended upon the pit lane drag strip at Atlanta Motor Speedway Friday night as drivers jockeyed for critical points in pursuit of division championships set to be awarded next week.

Entering the night, seven of the 18 divisions were separated by three points or less, a virtual tossup with two weeks remaining, while 14 divisions were still mathematically up for grabs.

Kirk Pennywitt of Sharpsburg doesn't have the point total to seize the Factory Street Division title next week, but you wouldn't know it based on his performance the past three weeks. You probably wouldn't hear it either.

Pulling up to the staging area, a confounding silence furrows brows as his wheels spin, smoke emanating from the pavement with nary a sound.

His 2013 Tesla is all electric and puts its combustible engine-powered competitors to shame. Since making his season debut two weeks ago in Week 15, all Pennywitt has done is win the division three weeks in a row without ever burning a drop of fuel.

"It's a blast," said Pennywitt. "It's a lot of fun. Three weeks in a row."

Picking off fast cars in the division one-by-one, Pennywitt worked his way back into the division's final race Friday night and met Chris Moon from Douglasville, who was making his season debut behind the wheel of a 2014 Ford Mustang.

It wasn't even close.

"It's fun showing people what an electric car can do," said Pennywitt. "It generates maximum torque at zero RPMs. It doesn't have a transmission, so it never shifts. It doesn't hurt the car, and it's fun to win."

In the more common combustible engine category, it was business as usual for several top contenders. Billy Clevenger racked his fourth straight victory and seventh overall in the Harbin's Mechanical Services Super Pro Division, while Brian Leath of Hampton added his own fourth straight win in the Truck Division.

Other notable winners include David Harbin in the Atlanta Journal-Constitution Super Pro Division, Kelly Morgan in the Harding Plumbing, Heating and Cooling Domestic Division and Douglas Anglin in the Street Modified Division.

Setting up for next week's season finale, showdowns in the Zaxby's Street Outlaw Division, Summit Racing Equipment Sportsman Division, Truck Advanced Division, Street Modified Division, Tuner Division and Sport Compact Division will highlight Week 18, as championship titles will come down to the wire.

Below is a complete list of the Aug. 21 race winners:

Harbin's Mechanical Services Super Pro: Billy Clevenger (Jonesboro); 1963 Chevrolet Corvette
Atlanta Journal-Constitution Pro: David Harbin (McDonough); 1969 Chevrolet Nova
Zaxby's Street Outlaw: Shannon Shelton (Forest Park); 2000 Pontiac Trans Am
Summit Racing Equipment Sportsman: Rodney Tolber (McDonough); 1983 Chevrolet Monte Carlo SS
Harbin's Mechanical Services Domestic Advanced: Eric Roycroft (Grayson); 1986 Ford Mustang
Harding Plumbing, Heating and Cooling Domestic: Kelly Morgan (Jonesboro); 1968 Ford Mustang
Truck Advanced: Danny Mason (Locust Grove); 1976 Chevrolet Pickup
Street Modified: Douglas Anglin (Griffin); 1988 Ford Mustang
Factory Street: Kirk Pennywitt (Sharpsburg); 2013 Tesla
Diesel Truck: Justin Goodman (Griffin); 1994 Dodge Ram 2500
Truck: Brian Leath (Hampton); 1976 Chevrolet C-10
Sport Compact: Daniel Martinez (Griffin); 1996 Honda Civic
Super Bike: Robert Thomas (Griffin); Harley-Davidson
Sport Bike: Bryan Berube (Forest Park); 2006 Suzuki 1300
Motorcycle: Ricky Harrelson (McDonough); 2006 Yamaha R6
Thunder Tower West Harley-Davidson Cruiser/Dirt Motorcycle: Mike Webb (Stockbridge); 2008 Harley Electra Glide
ATV: Omar Ruiz (Cumming)
The Show-N-Shine competition featured everything from new imports to classic muscle cars and automobiles ranging as far back as the 1920s. Those vehicles then took part in the Speedway Cruise following judging.

Below is a complete list of the Aug. 21 Show-N-Shine winners:

Classic Custom (Through 1972)
First Place: Ken Moore (Griffin); 1936 Plymouth Sedan
Second Place: Jeff Mueller (Locust Grove); Model A
Third Place: Robert Morgan (Fayetteville); 1966 Chevrolet

Modern Custom (1973 through 1999)
First Place: Eli Devore; 1989 K1500
Second Place: Richard Mooney (Stockbridge); 1975 Chevrolet C-10
Third Place: Drake Barlaw (Newman); 1997 K1500

Current Custom (2000 through current)
First Place: Austin Lopez (Hoschton); Chevrolet Corvette
Second Place: Josh Barclay (Newman); 2005 Rubicon
Third Place: Rebecca DeVore (Alvaton); 2010 Chevrolet Camaro

Showroom Modern (1973 through 1999)
First Place: Jerry Knowles (Tyrone); 1999 Grand Prix

Showroom Current (2000 through current)
First Place: LaShelia Brown (Fayetteville); Maserati
Second Place: Rebecca Morgan (Fayetteville); 2015 Porsche Panamara
Third Place: Keith Chapman (Fayetteville); 2004 Dodge Viper Truck

Tuner
First Place: Jose Lopez (Griffin); 2013 Genesis
Second Place: Adam Wallace (McDonough); 2007 Mini Cooper
Third Place: Mark Peppers (Fayetteville); 2005 Honda Civic

Truck
First Place: Jake Matthews (Barnesville); 2009 Chevrolet Duramax
Second Place: Blake McDowell (Newman); 2014 Chevrolet Silverado
Third Place: Cole Lewis (Griffin); 2003 Ford F-150

Open
First Place: Roger Pike (Kimpton); 2011 Jeep Wrangler
Second Place: Kai Plummer (Portsmouth, Ohio); 2012 Jeep Rubicon
Third Place: Sandy Tarpley (Moreland); Shrek Buggy

Atlanta Motor Speedway's O'Reilly Auto Parts Friday Night Drags & Show-N-Shine wraps up the 2015 season with Championship Night finale next Friday, Aug. 28.

Grandstand gates open at 6:30 p.m., and nightly drag race eliminations start after 9:00 p.m.

Spectator tickets are just $8, and children 5 and under are free. Entry to either drag race or for the Show-N-Shine is just $20, or competitors can purchase a combo ticket for $30.

More information can be found at www.atlantamotorspeedway.com/drags or by calling the Atlanta Motor Speedway Ticket Office at (770) 946-4211.