Polished tpi plenum and runners

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Old Apr 4, 2019 | 06:22 AM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Polished tpi plenum and runners




Driver side plenum with 9th injector delete

Marks from a wrench
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Old Apr 4, 2019 | 06:27 AM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners


The only real "dent" not too bad



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Old Apr 4, 2019 | 06:29 AM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners

Polished Tuned Port Injection Plenum And Runners. Condition is Used. Setup is used for trans am, camaro, corvette and firebirds. They are nicely polished. No 9th injector slot, so they could be used for a nice 9th injector delete. Only polished in the visible areas. Could use a good buff. I started to, but lost interest. I went LS instead so these are up for sale. Please ensure that they will fit your application before buying. No refunds, no guarantees and no returns. I have about $200 into these, I'd like to get as much of that back as possible, make me a fair offer and we might make a deal. Keep in mind because of the box size its gonna run at least $30 to $40 to ship it residental. Might take trades on trans am parts. Offer up guys!
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Old Apr 4, 2019 | 10:06 AM
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Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: Polished tpi plenum and runners

SD or MAF?
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Old Apr 4, 2019 | 10:31 AM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners

Originally Posted by blacksunshine'91
SD or MAF?
It is for MAF.
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Old Apr 4, 2019 | 02:26 PM
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Re: Polished tpi plenum and runners

It's a bit hard to tell from the photo, but the plenum looks to be the 89-92 style with shorter fins/grooves. The way to know for sure would be to look on the passenger's side rear for the MAP sensor mount and vacuum port, and between the throttle bores for the early triangular shaped port. Also the triangle port plenums have the extra passage casting on the bottom. No triangle port and no MAP boss would be 89 only. If the MAP mounting boss and provision for the vacuum port are there, 90-92.

The runners are missing the provisions for the cold start injector, so that'd mean they're 89-92 style.

FWIW, knowledge is power.
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Old Apr 4, 2019 | 04:07 PM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners




Originally Posted by Drew
It's a bit hard to tell from the photo, but the plenum looks to be the 89-92 style with shorter fins/grooves. The way to know for sure would be to look on the passenger's side rear for the MAP sensor mount and vacuum port, and between the throttle bores for the early triangular shaped port. Also the triangle port plenums have the extra passage casting on the bottom. No triangle port and no MAP boss would be 89 only. If the MAP mounting boss and provision for the vacuum port are there, 90-92.

The runners are missing the provisions for the cold start injector, so that'd mean they're 89-92 style.

FWIW, knowledge is power.
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Old Apr 4, 2019 | 04:37 PM
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Re: Polished tpi plenum and runners

89 plenum
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Old Apr 4, 2019 | 06:44 PM
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Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Polished tpi plenum and runners

Are those runners stock bore?
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Old Apr 6, 2019 | 10:32 PM
  #10  
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners

Originally Posted by Tootie Pang
Are those runners stock bore?
Yes, they are.

PLENUM IS SOLD, RUNNERS ARE STILL FOR SALE!
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Old Apr 16, 2019 | 11:35 AM
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From: Chiefland, FL
Car: 1988 Trans am GTA
Engine: L98 350 TPI
Transmission: 700r4
Axle/Gears: Factory 9 bolt w/disc brakes
Re: Polished tpi plenum and runners

TTT
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