Years ago in the heyday of the 99-04's, TMA Turbo was the go to outfit to turbo your 3.8.
Andy built proven kits that were designed to work on 3.8/3.9's. Stock block cars were making good power for a few grand.
If you can find a used kit online for a decent price I'd say go for it. A low boost single application will net decent gains without much additional mods...mostly rearend and fuel mods are needed.
TMA aside, turbos are great but to really take advantage of them you need to turn up the boost which means necessary upgrades to just about everything. Bottom line, to do it right you have to spend money.
12 Black GT500 SVT PP l VMP TVS l JLT123 l O/R X l 28x11.50Rx15 M/T Street R's l BMR Suspension l Recaros
03 Sonic Blue 3.8 / 17 Magnetic Fusion Sport 2.7 EB