thats impressive... 21hp!

 

I’m glad you asked. Please don’t take any of my comments personally as I would like to help you understand why we have successfully been doing business in the aftermarket exhaust industry for 30 years now. We use slip-fit (aka slip-on) tubing w/ clamps for several reasons:

Slip-fit tubing with clamps provides a much better seal than bolting together at various flange points. Slip fits have about 2-3” of overlapping steel so the velocity is uninterrupted. The receiving end of the downstream tube is expanded just enough to fit over (and clamp down on) the upstream tube so there is no slow-down of exhaust gases. Butting up two flanges leaves potential room for gases to stagnate (in this case they might pool & swirl). This is similar to what happens to the water flow/current on a river right after/below a large rock. Another reason we use clamps is that it is more expensive to create extra flange points and include extra nuts, bolts, & washers. Adding extra flanges & hardware also increases the overall exhaust system’s weight. This extra weight in turn adds to shipping costs. Most car enthusiasts prefer to shed weight anywhere possible to make their vehicles more nimble.

When you install an exhaust system, slip-fit tubing gives you more wiggle room & flexibility to move components around before tightening. Flange points are rigid and inflexible; they install one way and one way only. If you’ve ever installed an exhaust system, sometimes a couple of inches can seem like a mile. An exhaust system heats up and cools down as you drive, stop, drive, stop, etc. As this happens, the steel in the exhaust expands and contracts accordingly. Slip-fit tubing allows more give & take and is not so unforgiving. Conversely, the flange point is rigid & static. Over time, this creates stress points that can cause the system to be more susceptible to failure.

Out of curiosity, who are the “many other” aftermarkets exhaust manufacturers who use “similar bolt together systems?” With the notable exception of Porsche (rear-engine = shorter exhaust system), most car manufacturers to my knowledge use slip-on tubing w/clamps whenever possible. The other option is welding your tubing together, but this creates similar streess points over time as exhaust components expand & contract from heat through daily use.

I hope I was able to answer your questions Weave, please let me know if you have any other specifics you would like to discuss.

 

The simple answer: the H-pipe flowed better and produced more power on the dyno than the X-pipe.

Now here’s the rest: we get that question a lot about this system, especially since the X-pipe is considered the best thing since sliced bread in several circles. We release our products the way they are b/c they perform at their peak ability. We measure, weigh, flow-bench test, and dyno our products so we have numbers behind our assertions of hp & torque gains. We experimented using the X-pipe & H-pipe on the same system and found that for this engine and this configuration, the H-pipe was superior.

 

While our dyno results show a peak gain of 20.45 hp, we would say that our estimated performance gains for this system would be between 15-20 hp and 12-15 ft-lbs of torque.

 

15-20 hp sounds real nice.

Thanks for giving us all the 411 on the borla exhaust system

 

Group Buy?? I have a stimulus check and I want to start stimulatin' the economy with a new borla setup.

 

Contact a Borla Vendor to Purchase Willizm

 

i will be the first to raise the on the HP claims..

 

NIce...

 

some one please buy this and dyno it multiple times and please hit us back with info becasue I can not belive the numbers.. I never really thought Id like borla seeing as its mainly for muscle... BUT if it does hit in the 15-20 hp range i will jump ship, BUT I just dont belive the numebers.......

 

Honestly if it makes about the same gains as the other exhaust companies out there then I'm all for Borla as it has an awesome note to it. Anything additional to 10HP is icing on the cake. How much do these go for?

 

I wonder how different the conditions for this dyno were from the one I had done last night...I was also on a dynojet and my stock HP was at 277whp on run1 and 279whp on run 2...Seems like your stock run was at 263whp if I'm reading it correctly...16WHP difference in stock form is huge IMO...Anyone else?

 

ok... heres the deal... I am getting the Borla Exhaust... confirmed it about 30 minutes ago... I have plans to do a write up on it and a before and after dyno... Borla is in the process of moving there production so it is going to take a few weeks to get to me... I will definitly keep everyone posted...

I will say Borlas Customer Service is Great!

 

Cant wait for the dyno...

 

different types of dynos read different numbers