Valve Cover 97/98 Z28

**Paulie** · 10-21-2010, 06:21 AM

Folks, please help me out with a part number or link for OEM/aftermarket dressed up perimeter bolt style valve covers for my 98.

The 97/98 are unique with perimeter bolts and I can't find an LS1 set up anywhere. I have relocated coils to get past a header heating problem and now need a decent looking set of valve covers.

The Chevy Competition covers don't come in a perimenter bolt pattern according to JEGS and GEN I, so I am stuck.

Thank you for the help!

**shady milkman** · 10-21-2010, 06:35 AM

Originally Posted by Paulie

Folks, please help me out with a part number or link for OEM/aftermarket dressed up perimeter bolt style valve covers for my 98.

The 97/98 are unique with perimeter bolts and I can't find an LS1 set up anywhere. I have relocated coils to get past a header heating problem and now need a decent looking set of valve covers.

The Chevy Competition covers don't come in a perimenter bolt pattern according to JEGS and GEN I, so I am stuck.

Thank you for the help!

why not convert to center bolt style ??

**Paulie** · 10-21-2010, 09:46 AM

Originally Posted by shady milkman

why not convert to center bolt style ??

I would like to avoid replacing the heads as I have a lot of money in the motor as it is. This may be my only option, and I'll just have to hope my mods will still work in the new heads.

There has to be a clean perimeter bolt valve cover option out there somewhere...at least that is my hope.

Thank you for your response.

**shady milkman** · 10-21-2010, 10:11 AM

what heads do you have on that are still perimeter bolt that arent stock ? almost all aftermarket heads are center now...let me see what i cant find ..i'll let you know if i find any covers

**Paulie** · 10-21-2010, 12:47 PM

Originally Posted by shady milkman

what heads do you have on that are still perimeter bolt that arent stock ? almost all aftermarket heads are center now...let me see what i cant find ..i'll let you know if i find any covers

The heads are stock...
it's everything in, under and around them that are upgraded.

**jb3golf** · 10-21-2010, 01:27 PM

You may just have to customize your existing covers. Have you thought about that????? Clean them up and paint them a nice color to match your engine bay or whatever you choose.......

**Paulie** · 10-21-2010, 02:53 PM

Originally Posted by jb3golf

You may just have to customize your existing covers. Have you thought about that????? Clean them up and paint them a nice color to match your engine bay or whatever you choose.......

I sure hope not, but this may well be all there is I can do. Grind off all the bolt studs and powder coat or go with engine paint.

I think I am going to call Morrosso's Tech folks and she what they have in the way of a solution before I dive into that mess...

**jb3golf** · 10-21-2010, 04:16 PM

Originally Posted by Paulie

I sure hope not, but this may well be all there is I can do. Grind off all the bolt studs and powder coat or go with engine paint.

I think I am going to call Morrosso's Tech folks and she what they have in the way of a solution before I dive into that mess...

Yeah, good call on checking with them first. Let us know what decision you end up making.

**shady milkman** · 10-21-2010, 04:26 PM

Originally Posted by Paulie

The heads are stock...
it's everything in, under and around them that are upgraded.

well it is only a matter of time before you will upgrade them. stock heads are ehh

**jb3golf** · 10-21-2010, 04:58 PM

Actually from what I've studied, stock 98 heads are very good heads. You can have a 10,11,12 second cam only vehicle with these heads. In fact, the 243 stockers vs the 241 stockers are ALMOST identical throughout the RPM range. Differences are between 3-8 horsepower on most dynos. Obviously as you add more hi-po parts, the difference becomes larger and the separation begins to show.

Not disagreeing with you Shady, 98's are at the bottom of the pack in terms of uprgraded head choices and what's out there..........

Trust me, if I had the money, I'd be all over some Trick Flow 215's or AFR's!!!

**shady milkman** · 10-22-2010, 11:11 AM

Originally Posted by jb3golf

Actually from what I've studied, stock 98 heads are very good heads. You can have a 10,11,12 second cam only vehicle with these heads. In fact, the 243 stockers vs the 241 stockers are ALMOST identical throughout the RPM range. Differences are between 3-8 horsepower on most dynos. Obviously as you add more hi-po parts, the difference becomes larger and the separation begins to show.

Not disagreeing with you Shady, 98's are at the bottom of the pack in terms of uprgraded head choices and what's out there..........

Trust me, if I had the money, I'd be all over some Trick Flow 215's or AFR's!!!

are you sure you arent thinking of the 853 vs 241s ? as the 243s will net you over 10 to the floor un-ported ....the 853s and the 241s are actually the same head..with minor..and i mean minor adjustments/differences..the biggest being the center mount points for the valve covers

**jb3golf** · 10-22-2010, 07:07 PM

Originally Posted by shady milkman

are you sure you arent thinking of the 853 vs 241s ? as the 243s will net you over 10 to the floor un-ported ....the 853s and the 241s are actually the same head..with minor..and i mean minor adjustments/differences..the biggest being the center mount points for the valve covers

Oh.....Ok. I see......

**9T8W66** · 10-23-2010, 05:20 AM

806's (97-98) are the original LS1 head
853's (99-early 00) were the first revision with center bolt valve covers
241's (late`00-04) are the same except for the casting process

Stock for stock there is NO reason to swap one for another.
243's are different story.

**TokerM** · 10-23-2010, 06:32 AM

Non-sponsor link PM sent.

**edit**
What I sent you was for a big block, they do have them for the 350 too, call them and ask.

**jb3golf** · 10-24-2010, 11:00 PM

So Paulie, what did you decide?????

**Paulie** · 10-25-2010, 02:11 AM

Originally Posted by jb3golf

So Paulie, what did you decide?????

Still pounding my head.

Calling the folks at Moroso today.

Most likely will be using a local machine shop to clean up and then powder coat the as built covers...

**jb3golf** · 10-25-2010, 10:03 AM

Originally Posted by Paulie

Still pounding my head.

Calling the folks at Moroso today.

Most likely will be using a local machine shop to clean up and then powder coat the as built covers...

I think that's a great idea and direction to go in. I mean, we both have the 97-98covers and at SOME POINT I certainly plan to upgrade to a LS6 stage 2.5 head or Trick Flows. So, why spend alot of money and effort, when the stock head is kind of holding us back from more power. Let us know when you get your current covers cleaned up. Take care.