jereahidiaboam

I am looking for any suggestions on ways to hop up my 25 without changing the engine.

Polar_Bus

Use the search feature with the words "mods" or "hop-ups" and you will archive a year's worth of reading on modding the Savage 25.

Savage_mt2_Attack

3 speed transmission
new wheels and tires
ofna throttle mod

HerrSavage

Search around and find out what all exactly you need to completely upgrade to Savage X SS diffs - shock tower, bumper posts, diff housings, etc.. Best thing you could do.

Then, after that, get an STS30.

SAVAGEJIM

I assume you have been running your S25 for some time and am now considering trying to get more performance out of it. As Patrick said, the STS D30M is a monster engine that comes at a very nice cost! Unfortunately, the S25 engine is not a very good powrhouse for Savage trucks and an engine upgrade is where you will see significant improvement as far as accleration and speed.

HerrSavage

Unfortunately though, beefing up your truck to deal with the power of the STS would cost more than the STS itself..