The G-Force GF5R is pretty bad ass..... but external shift rails:
https://www.gforcetransmissions.com/tran_gf5r.asp
I ran the G-Force GSR internal rail 4speed which was an awesome transmission in a 530rwhp/520rwtq 438ci LS7 powered Mazda RX-7 with 335's at all corners and 2470lbs wet with 8 gallons of fuel (no driver). While the 5speed would've been better.... the car was stupid fast even with the long gearing (3.31 gears out back with 26" tall tire).
https://www.gforcetransmissions.com/tran_gsr.asp
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Project: 1969 Chevelle, alum 5.3, GTS76 turbo, Chiseled Perf A/W intercooler, Holley Dominator EFI, Davis TC, JRi coilovers, 14" brakes, T56 Magnum. CTS-V Recaro seats!
Coffey Fabrication Nashville, TN doing the fabwork! 800rwhp+/25mpg+/9's@150mph goal
https://lateral-g.net/forums/showthread.php4?t=52976
1993 Mazda FD RX-7, built LS7, T56 Magnum, Holley HP, Davis Tech TC, 8.8" 3.73 Cobra IRS diff, DSS axles, Ohlins coilovers, big brakes.
CCW 18x11 front 315/30/18's and 18x12.5 rear on 335/30/18 RA1's,
2850lbs
10.31@137mph 165mph Shift-Sector 1/2 mile speed
441ci AllPro headed motor and 200lb weigh reduction in the works....
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Threaded Mode