I'm not sure of any desil performance places at all to be honest.
Everyone i know who does it is all DIY.
Talyn (AKA: der Schafen Führer)
1994 F250 XLT 4x4 Standard Cab - T-444E Direct Injection Turbo Diesel, 5 SPD M/T Z/F S5-420, Rosewood 160cc Stage 1's, PHP Tuner, 6637, Short Throw Shift Kit, Valair Kevlar/Ceramic, 140V IDM, T-500, 285/75/16 Cooper Discoverer ATP. Steyr C9-A1. You can get more with a kind word and a 2x4 than you can with just a kind word.
There is a great performance shop in Shelby township called Trucks R Us!! They might be CPC now because they sold part of the business.
No aftermarket part or accessory that is properly installed on your vehicle will void your original vehicle manufacturers warranty. According to the provisions in the Magnuson-Moss Warranty - Federal Trade Commission Improvement Act, It is the dealership's responsibility to prove that your modification directly caused or affected the failure you are trying to resolve. So don't worry about your warranty.
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