NGR's News NGR Turbo Filters Back in STOCK! Posted on July 30, 2021July 30, 2021 by NGR Performance 30 Jul NGR Turbo Filters are finally BACK IN STOCK! All sizes from 3in, 3.5in, 4in are back in stock! 5in will be releasing in August! NGR Performance Payment Plans with Afterpay! Turbo Filters are back in STOCK!