Jamie Whincup recovered from a crash in the day’s opening session to end practice for the Castrol Edge Townsville 400 at the top of the order.
Red Bull team-mate Shane van GIsbergen led the way for the majority of the 40 minutes after being the first to dip into the 1:12s bracket.
The Kiwi’s 1:12.78s stood at the top until just three minutes remained when Whincup put down his 1:12.55s.
Whincup’s crew had been forced into significant repairs between sessions after he clouted the concrete at Turn 3.
“It did a massive amount of damage and the boys basically put a whole new front-end in it,” said Whincup.
“The car is ok, I don’t think anyone really nailed it and we ended up P1.
“The track is slippery, so they’re going to be long races.”
Chaz Mostert and Will Davison squeezed between the Red Bull pair in the dying minutes, backing up their strong performances from earlier in the day.
Practice 1 pace-setter David Reynolds slotted into fifth ahead of Scott McLaughlin, Mark Winterbottom, James Courtney, Michael Caruso and Rick Kelly.
Like the opening session, the start was delayed while track workers attended to a surface break up at the Turn 2 hairpin.
The session ran green for its duration, with a trip down the Turn 2 escape road for Fabian Coulthard after a major lock-up the only notable incident.
Coulthard ended a tough day for DJR Team Penske in 22nd; one place behind team-mate Scott Pye.
The Super Street format sees no additional practice session on Saturday morning, ensuring teams must roll straight into qualifying at 1255 local time.
Result: Virgin Australia Supercars Championship Castrol Edge Townsville 400 Practice 2
|1||Red Bull Racing Australia||Jamie Whincup||Holden Commodore VF||1:12.5530*S|
|2||Supercheap Auto Racing||Chaz Mostert||Ford Falcon FG/X||1:12.5995 S||0:00.0465|
|3||Team Darrell Lea STIX||Will Davison||Holden Commodore VF||1:12.7206 S||0:00.1676|
|4||Red Bull Racing Australia||Shane Van Gisbergen||Holden Commodore VF||1:12.7792 S||0:00.2262|
|5||Erebus Motorsport Penrite||David Reynolds||Holden Commodore VF||1:12.8273 S||0:00.2743|
|6||Wilson Security Racing GRM||Scott McLaughlin||Volvo S60||1:12.8651 S||0:00.3121|
|7||The Bottle-O Racing Team||Mark Winterbottom||Ford Falcon FG/X||1:12.8668 S||0:00.3138|
|8||Holden Racing Team||James Courtney||Holden Commodore VF||1:12.9078 S||0:00.3548|
|9||Nissan Motorsport||Michael Caruso||Nissan Altima||1:12.9130 S||0:00.3600|
|10||Sengled Motorsport||Rick Kelly||Nissan Altima||1:12.9307 S||0:00.3777|
|11||Super Black Racing||Chris Pither||Ford Falcon FG/X||1:12.9674 S||0:00.4144|
|12||Monster Energy Racing||Cameron Waters||Ford Falcon FG/X||1:12.9717 S||0:00.4187|
|13||Holden Racing Team||Garth Tander||Holden Commodore VF||1:13.0164 S||0:00.4634|
|14||Wilson Security Racing GRM||James Moffat||Volvo S60||1:13.0598 S||0:00.5068|
|15||carsales Racing||Todd Kelly||Nissan Altima||1:13.1518 S||0:00.5988|
|16||Team BOC||Jason Bright||Holden Commodore VF||1:13.1916 S||0:00.6386|
|17||Freightliner Racing||Tim Slade||Holden Commodore VF||1:13.1925 S||0:00.6395|
|18||GB Galvanizing Racing||Dale Wood||Nissan Altima||1:13.1948 S||0:00.6418|
|19||LD Motorsport||Andre Heimgartner||Holden Commodore VF||1:13.2072 S||0:00.6542|
|20||TeamVortex||Craig Lowndes||Holden Commodore VF||1:13.2666 S||0:00.7136|
|21||DJR Team Penske||Scott Pye||Ford Falcon FG/X||1:13.2711 S||0:00.7181|
|22||DJR Team Penske||Fabian Coulthard||Ford Falcon FG/X||1:13.4750 S||0:00.9220|
|23||LD Motorsport||Nick Percat||Holden Commodore VF||1:13.5643 S||0:01.0113|
|24||Team Cooldrive||Tim Blanchard||Holden Commodore VF||1:13.8498 S||0:01.2968|
|25||Preston Hire Racing||Kurt Kostecki||Holden Commodore VF||1:14.1325 S||0:01.5795|
|26||Plus Fitness Racing||Aaren Russell||Holden Commodore VF||1:14.1852 S||0:01.6322|