ProFit™ 5-Speed System
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ProFit™ 5-Speed System
for Automatics
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C3
Corvette ProFit 5-speed - Click here
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C3
Corvette ProFit 5-speed for automatics - Click here
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This kit is perfect for upgrading your Corvette 4-speed
manual transmission to a 5-speed overdrive.
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This kit is perfect for upgrading your Corvette automatic
transmission to a 5-speed overdrive.
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TREMEC 5-Speed Bare Unit
TKO-500 / TKO-600
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American Powertrain's SuperShift™ Overdrive Automatic System |

Basic
5-Speed
System - Click here |

C3 Corvette SuperShift™
Overdrive Automatic System - Click here |
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SuperShift to an overdrive automatic system when converting your
C3 Corvette. |
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6-Speed System
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ProFit™ 6-Speed System
for Automatics
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6 SPEED KITS AVAILABLE FOR A LIMITED TIME !
Please call for pricing and details |
6 SPEED KITS AVAILABLE FOR A LIMITED TIME !
Please call for pricing and details |
This kit is perfect for upgrading your Corvette 4-speed
manual transmission to a 6-speed double overdrive.
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This kit is perfect for upgrading your Corvette automatic
transmission to a 6-speed double overdrive.
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ProFit™ Systems
The ProFit™ Systems
are the easiest and most economical way to put a high strength,
modern overdrive Tremec TKO 5-speed transmission or T56 6-speed
transmission in your car. Our Custom Engineered ProShift™
Tailhousings and Shift Mechanisms provide the smoothest
operation, the shortest throws and the only true internal offset
in the business. Enjoy a ProFit transmission with low RPM
cruising, and great fuel economy today.
SuperShift™ Systems
Only American Powertrain's SuperShift™ Systems provide every
component needed to replace your stock transmission with an
overdrive 4-speed automatic, right down to a stock appearing
4-Speed Shift Selector for the console. Install SuperShift™
in a weekend and begin enjoying the hot performance, great fuel
mileage, extended cruising range and quiet highway operation of
The SuperShift™ System without decreasing the value of your car.
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