Unfortunately no easy & cheap ways to get noticeable power increase with bolt-on mods. You can spend thou$ands and get 10-15hp increase. Best $-to-HP value is from the inside out:
- hybrid stroker crank for 2.8-2.9l
- Eagle 4G63 rods
- sleeve block for oversized Chevy pistons
- higher compression 10.0-10.5:1 like the Euro cars
- Rogue NA-tune for dyno tuning
Now you're looking at +60-70hp easily with substantial increase in torque. Gives you 944 Turbo performance for less than the cost of selling your 944 and buying a 951.
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