# My C5Z made 610RWHP NA today... **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [June 4, 2010, 3:43pm UTC](https://forums.speedlife.net/t/my-c5z-made-610rwhp-na-today/205068 "2010-06-04T15:43:19Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![Darkstar](https://avatars.discourse-cdn.com/v4/letter/d/b487fb/32.png) [@Darkstar](https://forums.speedlife.net/u/Darkstar)\ **Post date:** [June 7, 2010, 8:22am UTC](https://forums.speedlife.net/t/my-c5z-made-610rwhp-na-today/205068/6 "2010-06-07T08:22:52Z")
> [@I hate Rings, I sure would wear this one though.](https://forums.speedlife.net/t/i-hate-rings-i-sure-would-wear-this-one-though/42326/6): > > …we made a few changes to the car in prep for taking it to the strip Sunday. We only gained ~10hp at peak up to 610RWHP and just a bit of torque (up to 532 from 529RWTQ). I’m waiting to get the graphs, but my tuner said it did pick up a good bit under the curve despite the somewhat disappointing peak #s. > > What we changed:- We ditched the 85mm stock C5 MAF and went Speed Density. The Haltech intake bridge I had has a 96mm opening so we just put a filter straight onto it. Keep in mind I’m running a 102mm Throttle Body and 102mm FAST “LSX-R” Intake Manifold.- Borla straight-through 3" catback replacing the stock C5 Z06 Ti exhaust. The X-pipe unfortunately still necks-down to 2.5" just before the flange for the catback. Still, compared to the small piping of the Ti (a little under 2.25" actually) and the two 180\* turns that the exhaust makes in the Ti I expected a good gain here. > > I’m thinking we’re really running into the limitations of the “LS-style” intake manifold, even if it is the big 'ole 102mm. I’m just not going to do a big single plane or sheet metal intake, or individual throttle bodies. After the strip this weekend we’ll probably just put the Ti back on it and be happy w/ the 600RWHP. > > -TJ I got a letter in the mail on Friday stating that my registration will be eligible to be reinstated on 6/30/10. WOOOOOOOOOO --- _[View the full topic](https://forums.speedlife.net/t/my-c5z-made-610rwhp-na-today/205068)._