Borla resonator question - (inlet choke)

[Corvette95]

I was lucky enough to be at the right place at the right time to score a new "old" Borla stainless steel exhaust ( cat back). The resonator has the 1 5/8 inlet restriction, which per Marc H, cost horsepower, and he also states the system is great with the resonator removed. So my question is this, has anyone tried to use the resonator and open up the choked inlet and if so, what was the difference in noise and or resonance? Two, does anyone know where I can get a stainless "x" pipe (of any brand) that I could use in place of the Borla? Three, I can try to install straight Vibrant brand resonators (2). Thoughts and suggestions appreciated.

[32valvesftw]

I had a full Borla set up on mine, I had the resonator replaced with an X-pipe. It made a noticeable difference in sound and seat of the pants feel. It did make the exhaust quite a bit loader. If I had to do it again I would have left the resonator in place.

[tf95ZR1]

I replaced my Borla resonator with a B & B X-pipe.
Same day before & after dyno gained 25 hp. I personally
don't find it to be louder at all. Yes, resonance @ 1800 RPM,
which usually happens to be my cruising range.
Damn, but oh well.
Add to that the transmission chatter of a lightened
flywheel makes for a symphonic driving experience!
But at WOT...

[Paul Workman]

Originally Posted by tf95ZR1

I replaced my Borla resonator with a B & B X-pipe.
Same day before & after dyno gained 25 hp. I personally
don't find it to be louder at all. Yes, resonance @ 1800 RPM,
which usually happens to be my cruising range.
Damn, but oh well.
Add to that the transmission chatter of a lightened
flywheel makes for a symphonic driving experience!
But at WOT...

Ted, Ami's Z has the 3" B&B with headers, sans cats, and were it not for the 4.10 gears cruising at 70 mph "drone city". But, calk up another (+) for 4.10s: the put resonance behind you at highway (read: 70+ mph) speed. However, in the "drone zone", the B&Bs howl pretty good (-bad).

[Corvette95]

Well this is what I decided to go with.... (2 of these)

[Corvette95]

Hey! Thanks! Good information! I?m am on mobile so can?t see the pictures right now, is the magnaflow stainless as well?

[XfireZ51]

I originally started out w the MF cat back but swapped out the resonator, which had an internal ?X? pipe but was really a Y pipe, for the SW Xpipe. The internal cheese grater that was in the SW X was removed. Then the 3? ID pipe continues into 3? ID inlet DynoMax Ultraflows. The UFs have C6 Z06 NPP tips welded onto them with vacuum control in the console.

[Corvette95]

I like the idea of the valves, I was/am eventually planning on a B/B Fusion system. That was before I came across this Borla. How do you get vacuum to the exhaust valves also, I see some brands with electric blades. I have found this 2.5 in Ford resonator (would mount upside down so "Ford" isn't visible, or maybe two straight Vibrant resonators. I want something that would "clamp" in instead of weld if possible.

[XfireZ51]

The 92 ZR has the charcoal canister in the right rear corner of the chassis while the 90 is in the front left hand corner. The 92 vacuum line is routed from the plenum to the right rocker panel where there is a hard plastic line running towards the back and over to the canister. The vacuum has been re-routed to the NPP valves instead. I?m using a vacuum solenoid to control vacuum flow to the valves. Most of the time I run w the valves closed.

[Corvette95]

That's what I figured. My 90 is the last year of the front corner charcoal canister. I am thinking pro's and con's of vacuum vs electric. Don't really want to be able to see either a vacuum line or non stock electrical wires. I would hide either some where. If electric, I could run wires from center console cigarette light or accessory a/c port OR maybe I could install an additional secondary pump for vacuum. I like everything neat, so would love to see yours and others installation solutions. I SOOOOO want to be completely done by Dec. 31st! Thats my latest arbitrary deadline!