Doing a spark plug change on my 1988 L98 tomorrow and I'm leaning towards the AC Delco Rapid Fires, but I've heard they are too long of a spark plug if you have SLP headers (which I have), is this true?

 

I used the Rapid fire #8s in my ZZ4TPI with SLP 1 5/8" headers. They offer the same clearance as the stock MR43LTS plugs that came in the ZZ4. Remember, the ZZ4 has angle plug heads. Hope this helps.


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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

[This message has been edited by Rob P (edited May 02, 2001).]

 

you can also get the accel shorty plugs for around $30. I used them for split angled plugs and they work great

 

I have the same exact set up, 1988 L98 with SLP 1 3/4" headers. I had the Rapid Fires and they went in fine. Just use a short spark plug socket.

IMHO The Bosch Platinum +4's fit beautifully.

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

[This message has been edited by Joseph Andres (edited May 03, 2001).]