About performance headers & intake for stock 350
Thread Starter
Member
Joined: Oct 2014
Posts: 277
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From: Italy
Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
About performance headers & intake for stock 350
hi 
I know this is a common and lovely topic, although I didnt manage to find many explanatory topic here.
I have a stock 350 TPI with cut cats and a bigger air filter (dunno the name) (useless right now I think).
I would like to gain from 15 to 25 more HP, without spending too much money (shipping stuff in Italy is expensive
). I was suggested to buy headers, intake and 22lb injectors.
About headers, a friend suggested this: http://goo.gl/kst4AX
Are good headers? How many HP gains circa?
If they are bad, what model do you suggest?
About intakes, I don't have a clue. What do you suggest? I would like to spend 350$ shipping included :/
Thanks for any help!

I know this is a common and lovely topic, although I didnt manage to find many explanatory topic here.
I have a stock 350 TPI with cut cats and a bigger air filter (dunno the name) (useless right now I think).
I would like to gain from 15 to 25 more HP, without spending too much money (shipping stuff in Italy is expensive
). I was suggested to buy headers, intake and 22lb injectors.About headers, a friend suggested this: http://goo.gl/kst4AX
Are good headers? How many HP gains circa?
If they are bad, what model do you suggest?
About intakes, I don't have a clue. What do you suggest? I would like to spend 350$ shipping included :/
Thanks for any help!
Joined: Mar 2014
Posts: 4,553
Likes: 806
From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: About performance headers & intake for stock 350
I would use Hooker 2460 and a dougs y-pipe to go with it. Then run 3 in intermediate pipe back to a good muffler and you will have that 20hp
Thread Starter
Member
Joined: Oct 2014
Posts: 277
Likes: 0
From: Italy
Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: About performance headers & intake for stock 350
Im confused 
Anyway, I have 1989 GTA, with dual cats, so in theory I dont need the y pipe, I have two "tubes". See image:

Right? I dont' even have the dual cats because the prev owner eliminated them.

Anyway, I have 1989 GTA, with dual cats, so in theory I dont need the y pipe, I have two "tubes". See image:

Right? I dont' even have the dual cats because the prev owner eliminated them.
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: About performance headers & intake for stock 350
Your Sway Bar End Link Bolts are installed upside down. Threads go UP!
Just trying to help out
Just trying to help out
Thread Starter
Member
Joined: Oct 2014
Posts: 277
Likes: 0
From: Italy
Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: About performance headers & intake for stock 350
you guys are eagle eyed 
Yeah, some folks already noticed that. I have no plans to bring the car to fix this end liks thing, it required me time and money. Is it a relevant problem?

Yeah, some folks already noticed that. I have no plans to bring the car to fix this end liks thing, it required me time and money. Is it a relevant problem?
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: About performance headers & intake for stock 350
To keep it simple, remember this:
A SBC is an air pump, make it flow more air you get more HP.
A SBC is an air pump, make it flow more air you get more HP.
Thread Starter
Member
Joined: Oct 2014
Posts: 277
Likes: 0
From: Italy
Car: 1989 Gray ttop GTA
Engine: 5700cc
Transmission: auto 700R4
Re: About performance headers & intake for stock 350
yeah, welding is not a problem. The question still remains the same: what headers should I buy to gain 5-10 hp???
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