Oh geez! When it comes to the L67, mods are plentiful! Everything can be changed nowadays. Pistons, connecting rods, superchargers, electric water pumps, belts, sparkplugs, injectors, tuning, oh the list goes on!
Here is a trivia question for ya. What was the first FRONT wheeled drive car ever to break the 200MPH record? Would you believe it was a 2000 Bonneville SSEi?! At the Bonneville Salt Flats in Utah. I belive, it was a few GM engineers that suped up the L67 with more power and I think they estimated close to 700hp. This was without a turbo.
The intake mod is limited based on the body style. Not too many people(grampas LOL) mod their cars. Thus why the limited market and why it has to be custom, but it can be done!
1997 Pontiac Bonneville SEi-SCRAPYARD
2000 Chevrolet Blazer LT 4X4 4.3L
2002 Chevrolet *-10 LS Ext Cab 4X4 5.7 V8