Mods that are not loud but productive - So, back in my younger days I use to have a 1988 Rx7 Turbo II. Anyone who has had Japanese turbo rides ...

So, back in my younger days I use to have a 1988 Rx7 Turbo II. Anyone who has had Japanese turbo rides know that you could make small mod changes with big bang effects without the straight pipe back from the turbo down. I'd like to do the same for my Sierra. My ultimate goal is to drop in a supercharger, fill out the wheel wells with some deep dish rims and tires and a scooped hood. The problem is I have no idea where I can start to prepare for when I drop in the supercharger.

Now I am not a noise guy. I don’t like loud sounding rides. I prefer the sleeper type. Pull up alongside you on the interstate and then open up the flood of speed on you. I suppose I could start working around the air intake area but how does that affect my warranty. To be honest with you I know at some point base on what I want to accomplish I would void my warranty but I’d like for it to be later rather and soon. I'd like to install dual pipes back from the cat, but without the noise. Can I use a larger diameter pipe? What's the largest I can use? And then there is the onboard computer. What mods can I make there?

I wouldn't worry about your air intake area if you plan on going through with the supercharger idea. The supercharger upgrades air intake anyway, but I definitely recommend an exhaust system before the supercharger along with long tube headers for maximum performance gains. As for a tune, up to what supercharger brand. What supercharger brand are you looking at?

I think you're asking a lot- sleeper trucks are hard to find. Superchargers make lots of noise, and if you do add boost, you'll have to open that exhaust up, too. Even using a CAI can add lots of noise. Big V8s don't like to be quiet; even at stock level, they're louder than any other stock car on the road (except sports cars). However, using a programmer or getting a custom tune doesn't add to the sound level...

Let us know what you decide to do... this is an interesting goal for your truck!

You could do an E-Cutout for your exhaust. Open it up when you want that performance. Closed will be quieter, but as stated above V8's like to be loud.