British Touring Car points leader Colin Turkington does not expect any further performance balancing measures to slow down his BMW after the recent change to the car's first-gear ratio.
Turkington won twice last time out at Oulton Park to move into the championship lead and all rear-wheel-drive cars, such as his WSR BMW, will now have to run a longer first gear to reduce their startline advantage.
The 2009 BTCC champion is unsure how badly the change will affect him, but does not anticipate any further measures.
"I think this'll be us for the season," Turkington told AUTOSPORT.
"I can't see us suddenly dominating and I can't see any more changes."
Turkington, who won twice at Croft last season, believes the BMW 125i M Sport will still be competitive this weekend.
"We've been trying to see what we've got with the longer gear, but it's hard to know until you're in a race," he added.
"It doesn't affect the car once it's up and running - from the organiser's point of view it's just about balancing the starts.
"I think we'll be competitive at Croft. We were quick there last year and it suits RWD, but there are no guarantees."
Turkington believes the FWD and RWD cars are currently evenly matched and is confident he will be competitive everywhere.
"Last year we had peaks and troughs, but there's nowhere on the calendar we look at and think 'that's going to be hard work'," he said.
"But that's true of MG and Honda too - that's where you have to be."