i insalled the new slp runners on my z,needless to say i`m not impressed,anyone else satisfied with there`s

 

I have them on mine and they work pretty good but to really get the full effect they need to be port macthed to the plenum and base.

 

What other mods have you done to your engine, unless you have any other items that will increase the flow of both air/fuel through your engine you will more than likely not see a huge increase, now if you have a nice set of headers and exhaust, a little better cam and even a little better flowing set of heads, and mayebe even an AFPR, you would see a lot larger increase. Like Derek said you would have seen a better gain also if maybe you port match to the base, and do a little plenum work. But as far as just bolting a larger runner on you now get a tire schredder by doing just that. If you dont want to do all that, them at least put a AFPR on it and bump it up a little and you will see a lot better gain. Good Luck.

 

They were on my '87 IROC-Z LB9/G92 vert when I got the car. The car also had the Edelbrock TES headers and SLP 2 on the left catback exhaust. I, naturally, was impressed with that combination compared to a stock combination fwiw.

 

Check out the tech articles on the homepage. There is a write up on how to siamese the runners yourself. I bet if you did that, youd at least be somewhat impressed.

 

I've had mine on for 3 years and I like them. I did a lot of porting work on them and port matched them to the upper plenum. But I still want a stealth ram.