All the Page advertisers take a look at signatures you can see a trend, of who provides great service and or products.
Might be better to search for specific product you are considering and read up on it in pages here, i'd like to caution you though in zeal to performance building unless you can do it all at once,
There is a sequence to doing it IMO for instance adding fuel and boost without taking care of breathe ability of the engine you will not get as good a result for your $$$, plus run risk of overheating and breaking something.
Oh before I fergit, welcome to the site, once you do some navigating and figure out your RPO codes, update your signature so we know what equipment you have for future troubleshooting reference, a little basic info helps us to form an opinion which way to advise you in troubleshooting efforts.
Tim, 98GM K1500 6.5TD(L56/L65), Heath PCM,3.73 gear,4L80 tr,4" exh,Amz air filt&dual oil flts, Heath remote FSD, TDO-7 clone turbo, Heath fan clutch,mandrel crossover, pilar gage BST/EGT/TRN, remote elec fan tran cool,alum trn pan