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99 NB LS6/T56 in SW Florida

Old 05-18-2019, 02:11 PM
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Location: Port Charlotte, FL
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Default 99 NB LS6/T56 in SW Florida

1999 Miata with a Boss Frog V8 conversion

The engine was a 5.7 liter all aluminum LS6 from a 2005 Cadillac CTS-V rated at 400 HP and 385 lb-ft of torque. The block was just replaced with another LS6 from a 2002 Z06 Corvette, with the same casting number as the CTS-V - 12561168. The engine was completely rebuilt with a cleanup bore, new pistons and balanced. It only has about 500 break in miles since the rebuild.

The car shows 65,100 miles on the odometer, but the instrument cluster was replaced and the chassis has 109,400 miles on it. There are 13,100 miles on the conversion which was performed in 2010 by the previous owner. He created this web site to document the build

It has Hooker headers and a custom 2 inch exhaust.

Custom cold air intake.

Hi-flow custom aluminum radiator with dual electric fans.

6-speed T56 manual transmission from a 2000 Firebird.

Exedy Spec Stage ll clutch kit

Aluminum driveshaft and upgraded halfshafts

3.73 LSD 8.8 inch differential from a 1997 Mercury Cougar, which allows for retention of the independent rear suspension.

Boss Frog Arm chassis stiffeners

Frame rail reinforcement kit

Hard dog roll bar hoops for real protection, not just style bars

Wilwood brakes

Bilstein coilovers

15 X 8 Advanti Storm wheels weighing 11.1 pounds each

225/45/15 Hankook Ventus R-S3 V2 with a 200 tread wear rating

Also included are four 16 inch Rota wheels with all season tires and a trailer hitch which is not installed.

The bad

No working A/C. It is a factory A/C car and the compressor is mounted on the engine, but there are no hoses or condenser.

There is an occasional clunking noise because the shop that installed the 3:73 ring and pinon set up the differential with too much play in the gears.

The asking price is $27,500.

If you are interested or have any questions, please call Lance at 314-717-7536.

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