idrivejunk
New member
Hey, stock GP drivers! Heres a free one for your Saturday afternoon. Advanced GPers with CAI can go right past this post...
If you have a 98-03 3800 GP (whichever years had the "improved" airbox like a 99-up as shown) N/A or supercharged with the stock airbox, check this out:
This how-to shows how to let supercharger noise out of a stock airbox. A simple and free one hour modification, all you need is a drill and bit after removing the airbox. If you don't plan on major mods but would like to let the M90 speak, this is for you. It might howl on GTs also but I have not tried it on one. No claims one way or the other about power. I just wanted noise and the 99 GTP coupe already had a K&N drop-in. I didn't think the mod would be as successful as it was but after enjoying the nice level of whine for awhile, I figured some others may want to try this as a no buck alternative to messy cone filters. I tried that and it was a little too noisy for my taste.
First, remove the entire airbox
Now, see the phillips screw on this piece? Remove that baffle and leave it out.
This group of grooves on the outside of the box is at the baffled area
I used a 1/8" drill bit in a Dremel tool. Drill a series of holes along each groove then carve it out from there, carefully with the bit.
Heres the inside. You can feel free do it more neatly!
Slap it all back together and you can barely even find an angle to see them from. Still looks factory fresh.
Click on these images to compare before and after sound. Nice and whiny with windows up or down.
Before:
After:
Theres no reason this wouldn't add cool sound to a N/A car as well. TRY IT! Kinda looks to me like GM intended for us to do this if desired, by the way the box is made. There is another row of grooves across the top of the box that could also be cut out but this seems to be sufficient, and keeps the filter clean and dry like stock. Just a poor boy mod, really.
If you have a 98-03 3800 GP (whichever years had the "improved" airbox like a 99-up as shown) N/A or supercharged with the stock airbox, check this out:
This how-to shows how to let supercharger noise out of a stock airbox. A simple and free one hour modification, all you need is a drill and bit after removing the airbox. If you don't plan on major mods but would like to let the M90 speak, this is for you. It might howl on GTs also but I have not tried it on one. No claims one way or the other about power. I just wanted noise and the 99 GTP coupe already had a K&N drop-in. I didn't think the mod would be as successful as it was but after enjoying the nice level of whine for awhile, I figured some others may want to try this as a no buck alternative to messy cone filters. I tried that and it was a little too noisy for my taste.
First, remove the entire airbox
Now, see the phillips screw on this piece? Remove that baffle and leave it out.
This group of grooves on the outside of the box is at the baffled area
I used a 1/8" drill bit in a Dremel tool. Drill a series of holes along each groove then carve it out from there, carefully with the bit.
Heres the inside. You can feel free do it more neatly!
Slap it all back together and you can barely even find an angle to see them from. Still looks factory fresh.
Click on these images to compare before and after sound. Nice and whiny with windows up or down.
Before:
After:
Theres no reason this wouldn't add cool sound to a N/A car as well. TRY IT! Kinda looks to me like GM intended for us to do this if desired, by the way the box is made. There is another row of grooves across the top of the box that could also be cut out but this seems to be sufficient, and keeps the filter clean and dry like stock. Just a poor boy mod, really.
I'm going to do this tonight. Registered just to say thanks.
Keep reading these forums, they are very informative. Careful with the drill, and with the right foot tomorrow.
