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1986 Buick Grand National Twin Turbo Supercharged LSA "1 of 1" Custom Show Car

Make: Buick
Model: Grand National
Type: Coupe
Year: 1986
Mileage: 9,370
VIN: 1G4GK4774GP454431
Color: Black
Cylinders: 8
Fuel: Flex Fuel Vehicle
Interior color: Gray
Vehicle Title: Clear
Item location: Glendale, Arizona, United States

1986 Buick Grand National Additional Info:

1986 Buick Grand National “1 of 1” AKA "Grand Nasty"

VIN: 1G4GK4774GP454431

Miles: 4K Original Mile Car Prior to Engine Swap

5370 Miles on Dash since Engine Swap

Low Production Vehicle Only 5,512 Made

This is the car GM Buick should have made! No expense was spared, absolutely no corners were cut, and only the best was used in the build of this 1 of 1 immaculate custom show quality car! I have the original Window Sticker, Bill of Sale, Owner’s Manual, Warranty Booklet, Maintenance Booklet, Options and Add-On Sheet. Car was purchased brand new in 1986 from Connolly Buick in Framingham, Massachusetts and then acquired from RKM Collector Car Auctions in 2013 and has been in Arizona ever since. This car is highly documented including all paperwork and receipts since day one. Always garage kept, non-smoker, and rust free. Once finished it was appraised by Gary C. Sparks of Classic Auto Appraisals and valued at $150,000 and insured through Grundy Worldwide Inc. at $150,000 as well. This car has been featured on Fuel Curve and in Good Guys magazine and has won numerous trophies and awards this year at Holley LS Fest West, Good Guys 9th Spring Nationals, and Muscle Car Face-Off. This car is a MUST SEE to believe and appreciate. Vehicle is located in Arizona and can be seen upon request.

Under the Hood:

-GM 6.2L Supercharged LSA 416CU Stroked Engine 1100+ HP

-Lunati Crank and Rods

-JE Coated Pistons

-Frankenstein Stage 2 LSA Heads

-High Performance Injectors 1300CC

-Twin Turbo 57mm Garrett

-Hughes Built Stage III 4L80E Transmission 1500HP

-Melling Oil Pump

-ARP Head Stud Kit 2000

-ARP Cam Bolts

-Johnson Lifters

-Ron Davis Radiator with Dual Fans

-Air-Raid System

-Afco Cooler

-Trans Cooler

-High Output Alternator

-8.6 Pulley

-6 Bolt Flywheel SFI


-Momo Steering Wheel

-Paddle Shifters


-Cobalt Black Autometer Gauges

-Triple Gauge Pod

-Dakota Digital Dash

-Custom Bucket Seats (also have the original seats)

-Power Windows

-Power Door Locks

-Vintage A/C

-Viper Alarm

-Battery in Trunk

-Emergency Kill Switch

-Pioneer Double-Din Touchscreen DVD, Navigation, Apple Play, Bluetooth Stereo with Remote

-JL Audio Speakers

-JL Audio W7 Subwoofer

-2)JL Audio 600 Amps

-Dynomat Insulation


-$20K Christian Paul Customs Paint Job

-GNX Flared Fenders

-GNX Side Vents

-LED Headlights and Taillights

-Dual Exhaust

-Dynomax Mufflers


-Detroit Speed Suspension Fully Adjustable Front and Rear

-Re-Enforced Frame

-Posi-Traction Rear End

-Mosser Axles

-Detroit Speed Front and Rear Sway Bars

-Body Supports


-18” Custom 3pc Simmons Staggered Wheels

-Front: Yokohama YK580 245/45R18

-Rear: Mickey Thompson P305/35R18

-Baer Big Slotted Disc Brakes


-Holley LS Fest West (Las Vegas, NV – 2018)

-1st Place Best Engine

-1st Place Sponsors Pick

-1st Place Street Machine 75-95

-Good Guys 9th Spring Nationals (Scottsdale, AZ – 2018)

-Bitchin’ Buick

-Muscle Face Face-Off (Chandler, AZ – 2018)

-Best of Show

-Best Engine


-Engine Swap Depot https://www.engineswapdepot.com/?p=5103

-Fuel Curve https://www.fuelcurve.com/grand-nasty-buick-grand-national/

-Good Guys Magazine (June 2018)

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