The 1998 NAPA Auto Parts Sebring Classic presented by Royal Purple Motor Oil was the sixth round of the 1998 IMSA GT Championship season. It took place on September 20, 1998.

Race results edit

Class winners in bold.

Pos Class No Team Drivers Chassis Tyre Laps
Engine
1 GT1 4   Panoz Motorsports   David Brabham
  Andy Wallace
Panoz GTR-1 M 33
Ford (Roush) 6.0L V8
2 WSC 16   Dyson Racing   James Weaver
  Butch Leitzinger
Riley & Scott Mk III G 33
Ford 5.0L V8
3 WSC 20   Dyson Racing   Dorsey Schroeder
  Elliot Forbes-Robinson
Riley & Scott Mk III G 33
Ford 5.0L V8
4 WSC 8   Transatlantic Racing Services   Henry Camferdam
  Scott Schubot
Riley & Scott Mk III G 33
Ford 5.0L V8
5 WSC 97   Team Cascadia   Ed Zabinski
  Shane Lewis
Argo JM20 G 33
Chevrolet SB-2 6.0L V8
6 WSC 36   Matthews-Colucci Racing   David Murry
  Jim Matthews
Riley & Scott Mk III G 33
Ford 5.0L V8
7 WSC 92   Denaba Racing   A.J. Smith
  Joaquin DeSoto
Kudzu DLM ? 33
Buick 4.5L V6
8 GT2 99   Schumacher Racing   Larry Schumacher
  John O'Steen
Porsche 911 GT2 P 33
Porsche 3.6L Turbo Flat-6
9 GT2 54   Bell Motorsports   Scott Neuman
  Andy Pilgrim
BMW M3 ? 33
BMW 3.2L I6
10 GT3 22   Alex Job Racing   Cort Wagner
  Kelly Collins
Porsche 964 Carrera RSR P 33
Porsche 3.8L Flat-6
11 GT3 23   Alex Job Racing   Kelly Collins
  Darryl Havens
Porsche 964 Carrera RSR P 32
Porsche 3.8L Flat-6
12 WSC 63   Downing Atlanta   Rich Grupp
  Jim Downing
Kudzu DLM G 32
Mazda 2.0L 3-Rotor
13 GT3 6   Prototype Technology Group   Peter Cunningham
  Ross Bentley
BMW M3 Y 32
BMW 3.2L I6
14 GT3 10   Prototype Technology Group   Bill Auberlen
  Mark Simo
BMW M3 Y 32
BMW 3.2L I6
15 GT3 86   G&W Motorsports   Darren Law
  Steve Marshall
Porsche 993 Carrera RSR P 32
Porsche 3.8L Flat-6
16 GT2 56   Martin Snow Racing   Martin Snow
  Melanie Snow
Porsche 911 GT2 D 31
Porsche 3.6L Turbo Flat-6
17 GT1 77   G&W Motorsports   Darren Law
  Danny Marshall
Porsche 911 GT1 P 31
Porsche 3.2L Turbo Flat-6
18 GT1 5   Panoz Motorsports   Éric Bernard
  Johnny O'Connell
Panoz GTR-1 M 29
Ford (Roush) 6.0L V8
19
DNF
WSC 28   Intersport Racing   Jon Field
  Jacek Mucha
  Butch Brickell
Riley & Scott Mk III G 23
Ford 5.0L V8
20
DNF
WSC 7   Doyle-Risi Racing   Wayne Taylor
  Eric van de Poele
Ferrari 333 SP P 11
Ferrari F310E 4.0L V12