1991 z28 350 tpi auto has slp pkg from dealership headers full dual cat exhaust runners has dual pipes coming down from each header rare pkg.nice interior clean underneath needs paint runs good pm for more info located near Pittsburgh pa my zip is 16120 $3500

 

GLWS! Wish you were closer id love this for a daily driver instead of my boring trucks

 

PM sent

 

Will take it.. Please PM your #

Thanks

 

Knew I shoulda jumped on that one. Put me down for next in line if no deals get made.

 

Sold.....

 

Congratulations - real interesting car!

 

What is the difference between this car and the next car whos owner just buys the parts and the SLP sticker and punches out the slots on the sticker after installing the parts and then selling it?

And why would GM or SLP choose to run a Hypertech Memcal in the car? This doesnt make much sense. The sticker is punched out for the cold air induction package yet the engine is still using the OEM setup.

 

Nothing. GM offered the parts over the counter, so anyone could add them. Biggest difference between then and now is that the SLP parts offered then, aren't exactly the same as the ones they offered later... Like the Tri-Y headers for example, that were replaced with the 4 into 1 headers in the 90s.

Who says it's a Hypertech memcal? Hypertech offered underdrive pulleys, lower temp fan switches, cap and rotor sets... I want to say they offered an AFPR too... Imagine all of the above would have come with a sticker back in the day.

Edit: Derp... Forgot one of the most obvious Hypertech pieces, one I even have in my stash. LOL

 

If its a dealer installed SLP parts car it should have documents stating that. I have a receipt from dealer that did the install on my car.

Also, people do make mistakes or the air induction knockout could have just pulled out when installed

 

I thought the slp memical chip for the computer was slp exclusive. Was it really just a hypertech chip?

 

Did Chevy even participate in the "official" program? Got the impression that the SLP package at time of sale was a Firebird exclusive? Admittedly my 91 Camaro documentation is very slim to my 91 Pontiac stuff, but I've never seen anything linking the Camaro to SLP beyond the parts counter availability.

 

SLP and hyperjunk are 2 different chips. SLP had their own.

 

Hypertech only change wot timing. There thermomaster a arnt too bad of a tune changing fans on and offs and ve and sa.
The slp 40054 only changes knock retard in power enrichment.
Not that great of a tune over stock aujp.

 

I see, thanks for clearing that up. And tunedperformance the slp tune wasn't all that much better over a stock tune then? Well that's a bummer.

 

My issues (CEL) were resolved being able to find an exact year and package ECM w/factory chip over the Hypertech which was in the car when purchased.
The ECM was out of a 88 Pontiac 350 Formula that had 149K from Ohio, corrected the smog issues and runs far better than the original ECM.
Discontinued GM Part so tough to find OEM nowadays>>>