angle or straight

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Aug 12, 2003 | 03:11 AM

HawaiiZ28

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Joined: Apr 2003

Posts: 12

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From: Kaneohe, Hawaii

angle or straight

I'm about to buy a set of Pro Top lines for my 92 L98 TPI. I've got an unknown brand of headers on the car which were installed when I bought it. I'm worried about spark plug clearence and am wondering if i should get the angled or straight plug type.

Aug 12, 2003 | 03:40 AM

HawaiiZ28

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Junior Member

Joined: Apr 2003

Posts: 12

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From: Kaneohe, Hawaii

Did the search on a different board and found my answer.
Now my question is what are the factory L98 heads.
Angled or straight plug?

Aug 12, 2003 | 05:56 AM

Ricktpi

Supreme Member

Joined: Mar 2002

Posts: 1,654

Likes: 2

From: Lower Salford, PA

Car: 1987 Camaro Z-28

Engine: 6.3L Victor EFI

Transmission: Tremec TKO 600

Axle/Gears: Moser 9"/4.11 Trac-Lok

L98 heads are angle plug, but not as great an angle as aftermarket heads.

Aug 12, 2003 | 09:01 PM

DannyT

Senior Member

Joined: Jul 1999

Posts: 784

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From: Sacramento, CA

Car: 89 Iroc

Engine: 383

Transmission: 700R4

Axle/Gears: 3.45

Some will specify 'L98 angle head plugs'
That's how my AFRs were categorized

Aug 12, 2003 | 09:07 PM

PLANT PROTECTION

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Joined: Jul 2001

Posts: 952

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From: La Porte, IN

Car: 1987 Monte Carlo SS

Engine: L98

Transmission: 200-4R

Axle/Gears: 7.625 10 bolt/3.73s

Iron L98s are straight plugs and aluminum L98s are angle plugs. Pro Toplines straight plug heads, which I have, are angled downward causing the plug boot to rest on the #8 header primary. Unfortunately, the angle plug heads seem like they would fit worse. BTW, this is with SLP 1.75 shorties.