I did a search but couldn't find a ton of info on modifying or cutting "windows" in the factory TPI air filter housing for more air flow, particularly the canister style on the 88'-89' MAF cars. I saw the tech article mentions it and apparently the TPIS insider tips went over it as well... I am trying to maintain a "stock" appearance so I am not interested in the CAI kits with exposed filters etc.

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02-21-2021, 06:28 PM

Big&BadGTA

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Car: 89 GTA ASC Conv., Prev: 89 GTA 6.3L

Engine: 5.7L L98 TPI

Transmission: 700r4 Automatic

Axle/Gears: 3.27:1 w/ JG1 Options:B2L, N10, U1A

Re: Any ideas on modifying factory TPI air filter housing?

Yeah, you basically window the can, cutting a few rectangles, vertically, out of the can.

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02-21-2021, 07:00 PM

Reddragon88gta

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Car: 1988 Trans Am GTA

Engine: 5.7 L98

Transmission: 700r4

Axle/Gears: Borg Warner 9 bolt 3.27

Re: Any ideas on modifying factory TPI air filter housing?

Cool, that’s kind of what I thought but I pictured them horizontal in my mind for some reason. I’m tossing around a few options for this. Kinda thinking of outlining a rock auto magnet or 2 on 3 sides of the canister going vertical as you mentioned and cutting them out.

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