'99 Sub Performance Upgrades

'99 Sub carryover model (actually produced in early '98) K2500 7.4. Looking for ignition upgrades and possible chip upgrade. All ready has dual exh (true duals not cat back) and K&N FIPK (noisy little air sucker under power). Any suggestions on ignition & chips would be greatly appreciated. It's got a little over 100k on it now and I've got do do some ignition replacement anyway.

Thanks........Steve

it does not take chips you need a programmer hypertech has one.

i have a 7.4 vortec in my 99 gmc 2500 suburban also... i tryed hypertech... but i purchased a jet module hook it up to ur computer it does wonders with this u can smoke ur back tires.. 2500 cant do that factory..
hypertech reprograms ur system... jet fine tunes..