Which Spark Plugs

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Apr 10, 2011 | 01:03 AM

74Novaguy

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Member

Joined: Mar 2011

Posts: 101

Likes: 0

From: Mariposa, CA

Car: 88 Camaro IROC-Z

Engine: 5.7L 350 TPI

Transmission: 700r4

Axle/Gears: Stock

Which Spark Plugs

Ok so i ordered plugs for my camaro. There taper seat. the ones i pulled out are a gasket seat. Can I use the taper seat? im not even sure if the gasket seat ones are the correct ones because the guy I bought it from wasnt the smartest so he could have put the wrong ones in. its an 88 5.7 iroc-z.

Apr 10, 2011 | 07:43 AM

eseibel67

Supreme Member

Joined: Jul 2009

Posts: 2,328

Likes: 10

From: Kitchener, ON

Car: 1988 GTA

Engine: LB9

Transmission: T5

Axle/Gears: 3.45

Re: Which Spark Plugs

Taper seat are correct. Probably R45TS.

Apr 10, 2011 | 09:27 AM

sofakingdom

Supreme Member

iTrader: (1)

Joined: Sep 2005

Posts: 27,916

Likes: 2,448

Car: Yes

Engine: Usually

Transmission: Sometimes

Axle/Gears: Behind me somewhere

Re: Which Spark Plugs

Tapered seat plugs were introduced in the early 70s. All SBC heads since around 73 have had them. Unless your heads have been swapped, that's what you need.

You can check the head casting # to make sure what heads are REALLY there.

Wouldn't be the first time some PO had either swapped something, or just made an ignorant mistake.