OS Performance

OS Performance Specialization in all carbureted and LS performance along with engine build ,tuning and fabrication Owner Robert Hanneman

This BADASS 97 Tahoe is almost done! Hitting the dyno in a couple days and of course we will have videos of that! This T...
05/14/2026

This BADASS 97 Tahoe is almost done! Hitting the dyno in a couple days and of course we will have videos of that! This Tahoe got a Rob built Aluminum block 383 LS stroker motor, a new TCI 4L60E, Holley Terminator X Max, Dakota Digital gauges, 3.73 gears and a Posi unit, Belltech flip kit in the rear, rear disc brake conversion and so much more. This is one hell of a grocery getter for sure! Videos don't this truck any justice, this thing sounds like an absolute UNIT

This LS swapped 1967 Chevelle came in for a Wilwood master cylinder
04/24/2026

This LS swapped 1967 Chevelle came in for a Wilwood master cylinder

Been slacking on social media posts but for good reasons, this good weather has brought the hotrods out and we are busy ...
04/02/2026

Been slacking on social media posts but for good reasons, this good weather has brought the hotrods out and we are busy busy busy!

Some Wilwood brake action on a 96 Impala!
04/02/2026

Some Wilwood brake action on a 96 Impala!

This 1946 Ford came in with no spark so we diagnosed the problem and found that it was converted to a 12 volt system and...
03/04/2026

This 1946 Ford came in with no spark so we diagnosed the problem and found that it was converted to a 12 volt system and the points were receiving all the battery voltage and blew them out, we updated it to a Mallory electronic ignition system and got this old flathead back on the road!

Don't wait until it's too late, call us today to schedule an appointment to get your hotrod ready for the summer!!! We u...
02/24/2026

Don't wait until it's too late, call us today to schedule an appointment to get your hotrod ready for the summer!!! We use all quality parts including brands like Holley, Procharger, QA1, Wilwood Brakes, Induction Solutions, Edelbrock, MSD and so much more. We also offer in house tuning on Holley systems and all carburetors ranging from 1 barrels to dual carb setups, boosted, nitrous or N/A applications using our Dynojet dyno.

This super clean Oldsmobile Cutlass came in to fix a manifold leak
02/19/2026

This super clean Oldsmobile Cutlass came in to fix a manifold leak

This badass 65 Cobra kit car came in to ditch the stock foxbody fuel injection setup for a more classic looking holley s...
02/06/2026

This badass 65 Cobra kit car came in to ditch the stock foxbody fuel injection setup for a more classic looking holley sniper fuel injection kit and a dyno session, definitely a huge looks and performance upgrade for this car! The mostly stock 302 put down 250hp and 290tq to the tires

This 1980 Firebird came in for a much needed full rewire and a hydraulic clutch setup, the wiring was one bad bump away ...
02/06/2026

This 1980 Firebird came in for a much needed full rewire and a hydraulic clutch setup, the wiring was one bad bump away from sending the car up in flames and the clutch pedal and linkage was so worn out that the pedal was basically seized up. But after the American Auto wire harness, Holley clutch pedal/master, Mcloud hydraulic throw out bearing and Ram Clutch we got this bird FLYING.

Here is the second motor and transmission we have for sale, 283 with a Muncie 4 speed, once again built by Rob and ready...
01/16/2026

Here is the second motor and transmission we have for sale, 283 with a Muncie 4 speed, once again built by Rob and ready to go! All details are in the last picture!!!

Address

1250 Yeamans Hall Road
Hanahan, SC
29410

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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