Well i think its pretty clear,they are genuine Delco but comes with they re own cap and since tey will not be sold by Gm hey doesnt have to put them in a gm wich save them money.

Another vendor on ebay is doing the same thing but he is selling them 175$:
http://cgi.ebay.com/ebaymotors/95-96...8278QQtcZphoto

 

Sounds like typical parts store reman junk.

 

I ask the guy twice and he says that those are new unit not reman.

Give me time to receive them and i will tare one apart and make a review with pictures.

 

If it's too good to be true, it probably is.
Doesn't meant it's not going to work, but if the seller or Clyde from down the street put them together it could mean it just won't last as long.

 

I haven't gotten mine yet, but it does say lifetime warranty.

I just keep in mind that during my perusals of these LT1 boards guys that blew $500 Aftermarket Optis just as quick as OEM's, so really the price may not be too good to be true after all.

 

I contacted that seller a few weeks ago about their non-vented optis and their claim was that the unit was an original OEM AC/Delco. They never mentioned anything about the cap not being original. I also contacted someone who had purchased one and they claimed it wasn't an AC/Delco unit, but seemed to be pleased nonetheless. I inquired on this site as to whether GM ever manufactured optis with black caps, but got no feedback. I didn't buy one, but I know someone on this site did after I supplied them with a link, prior to contacting the purchaser mentioned above. I hope everything works out for that person.

 

Regardless of who manufactured it (GM or whoever), before you install it I would highly recommend removing the cap. Remove the rotor screws, place thread-locker on the rotor screws, reinstall the screws and ensure they are tightened correctly.

I’ve also had the rotor screws to get loose on a relatively new GM Opti in the past.

WD

 

Don't think too highly of those either.


Indeed. I was two weeks shy of going to court with Frank Parra Chevrolet in Irving, Texas over such a thing before they came to their senses and settled.

 

In most instances with performance car parts, the cheapest option is not the best option. While I had some problems with my new MSD Opti initially, without question the MSD is a far superior unit to the OEM GM Opti.

For example; when you examine and compare the MSD and GM rotors, the GM is ABS plastic with the rotor contract (tin plated, not brass) retained by melting the plastic. Whereas, the MSD rotor and cap are made with a space-age polymer. And, the contact on the rotor is high-quality brass and retained with a machine screw.

Additionally, the MSD has a very robust CNC machined aluminum housing and the GM has a light-weight cast housing body.

Once the MSD issues are corrected (use the new square O-ring and thread-locker on rotor screws), it is a solid unit capable of handling much higher RPM than the GM. And will possibly last much longer than the GM.

Possibly the MSD tech staff could have been more pro-active resolving the problems when they surfaced and that would have helped the overall image of the new MSD Opti. I’ve got the MSD figured-out now and my built 396 stroker engine is running great! Therefore, the MSD is my choice of Optis for high performance (higher RPM) LT engines.

WD

 

"Space-age polymer." You sound like Ron Popeil... LOL.

 

For those who have some in-depth LT1 experience with the Opti distributor and the various problems that can occur, I should actually sound like I know what I'm talking about!

WD

 

Hmm.... the phone number listed is somewhere in Santa Clarita which is about 45 minutes north of me. I may have to investiage once I need a new opti.

-B

 

The GM performance ACDelco Replacement Optispark Distributors have the same black caps, etc. They are sold by Summit, among others for only about $50.00 more. Could be the same???

 

From the way the add reads, it is not a GM part, but he mentions he has them in other auctions. Thats how I interpreted it.

 

Here's a Summit replacement cap & rotor:
http://store.summitracing.com/partde...5&autoview=sku

And here's an Accel replacement cap & rotor:
http://store.wpsracing.com/bucapandrobl.html

As you can see, both caps are black, but there's one detail that sets them apart: the Accel caps are made with brass terminals. I'm betting that this Ebay seller is getting their caps from the same supplier, except without the Accel logo printed on them.