Ho?
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Ho?
Hey guys, doing some header shopping, looking at hookers. There are two different listings, HO and non-HO. Whats the difference? Ive got an '85 berlinetta with a 305, would like to know which it is before I go buying stuff for it. Thanks much, Rob
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From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Easiest way to tell which headers you need is to look at your Cat.
If you have a 4 bolt flange on both ends, order the HO version. If no flanges are present, Non-HO. It's the only difference between the two.
If you have a 4 bolt flange on both ends, order the HO version. If no flanges are present, Non-HO. It's the only difference between the two.
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
STOP! CEASE! DESIST!
Do not buy any exhaust component made for an LG4 engine! Big, big mistake. This is the time to fix the problems the factory dumped on you, not perpetuate them!
Buying the non-HO parts will give you a small, restrictive y-pipe. You're trying to eliminate restriction by putting on headers, so don't spend $350 just to retain it. Get the HO application headers (p/n 2055), and put on a direct-fit cat for the '86-'90 TPI single cat while you're at it. It will fit the Hooker 2055's, since they're made for each other, and the cat-back for the same '86-'90 TPI application that you're going to get at the same time.
Yes, I know you don't have an '86-'90 TPI single cat car. But, it will bolt to your engine and fit within the chassis like they were made for each other (they were, the factory just didn't bless us with the "good" parts).
Do not buy any exhaust component made for an LG4 engine! Big, big mistake. This is the time to fix the problems the factory dumped on you, not perpetuate them!
Buying the non-HO parts will give you a small, restrictive y-pipe. You're trying to eliminate restriction by putting on headers, so don't spend $350 just to retain it. Get the HO application headers (p/n 2055), and put on a direct-fit cat for the '86-'90 TPI single cat while you're at it. It will fit the Hooker 2055's, since they're made for each other, and the cat-back for the same '86-'90 TPI application that you're going to get at the same time.
Yes, I know you don't have an '86-'90 TPI single cat car. But, it will bolt to your engine and fit within the chassis like they were made for each other (they were, the factory just didn't bless us with the "good" parts).
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Fantatstic response 57kid. Just one more reason why I love this board. Not gonna be buying any parts for probably six more months, just getting all my homework done now. Thank you for the great advice. I will definitely be going with the HO exhaust now.
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From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Excuse me people..... I simply stated the difference between the HO and non-HO CATs. I didn't tell him to order the non-HO's anyway. Please read above. 
Anyhow, I agree with what 5-7 Kid is saying. I didn't have to convert mine, so I don't know myself.
Anyhow, I agree with what 5-7 Kid is saying. I didn't have to convert mine, so I don't know myself.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Technically, the '86-'90 TPI isn't called "HO" by GM - that was limited to the L69, which was a 4-barrel setup from '83-'86 (I believe those were the years, anyway). But, the idea is still the same - the 2055's are the "good stuff".