hey i got a ? what is the cheapest way to raise my 98 blazer 4 door?? do i have to buy a key to tighten the torsion bars in the front??

 

no. the key is what actually what is moved by tightening the adjuster bolt, which increases the pre-load on the torsion bars, giving you front end lift. But there is alot more to consider than just 'woo hoo! turn a bolt and I get some lift!'

Check out the related threads below, and try some searches for suspension lift or torsion bar lift. You can do it the cheap way by tightening the bolts (~1.5' of lift) or you can buy new keys for $$ which will give you more lift. But again, searches will explain everything I assure you