Pontiac Grand Prix Canister-Style Filter

[CMT]

I'd like to ditch the airbox on my wife's 98 Grand Prix (w/ non-supercharged 3800) and replace it with an open canister-style filter similar to the famed BHAF used by Dodge/Ford diesel truck guys. I haven't been able to measure the space yet, but does anyone know off hand of a similar filter that will work? The stock box is missing one of the clamps that hold it closed (right now I've got a nylon cable tie reefed as tight as it can go holding the box shut) and I'm not sure how much I trust it's sealing even if all the right parts were there. Thanks for any help.

 

[Shaman]

If you want to stay stockish, the 99 and up boxes have better flow. If you gutted it, you would increase the flow a lot compared to what the 97-98 box provides. Aside from that, you could do the FWI where you use PVC or ABS to move a cone filter into the fenderwell area

do a search at www.clubgp.com for gutted airbox and I think that you could find some info.

 

[T-Keith]

I used a filter from a 98 Chevy Pickup and a home made aluminum box. Like Shaman said use a 99+ box, it flows much better, in fact there have been people running 12s with a stock 99+ box.

Stay away from a FWI or K&N filter which allow way too much dirt into the engine.