I run Champions in everything except my SRT-4. I run NGK in the SRT. The Champions do hold up better when using race fuel than the NGK's. I've ran both in the SRT, and could only get about 5k out of the NGK's during race season. The Champion showed no sign of wear with the race fuel. Only reason I run the NGK now is Mopar recommends them with the Stage 3 turbo upgrade.