Have you used their test pipes? Were not talking about a complex piece here, pretty much an 90 degree L pipe with a few minor angles.

Shadrach74,

Here's the answer to all of your header/cat exhaust woes . A set of custom fabricated headers and precats from M&M Exhaust in Germany. They feature longer, equal length primaries with 2.25 diameter piping, along with an F1 style merge collector and HJS 200 cell trimetal cats - beautifully made from T316 stainless steel . Net hp increase - probably somewhere in the range of 8 to 10 hp at the wheel . Cost - approximately $3800 . Aggregate cost- about $300 or so per hp . :)



http://www.fvd.us/us/en/Porsche-0/Boxster_986-13-41/-/-/item/item_details/VID_57324217-VCD_35203588-gid_28-sort_4-display_50-item_BES98601200S/EXHAUST_-_Tuning_-_Headers-BES98601200S-Sport_Headers_`Brombacher`__986_S_-04_with_200_cell_sport_catalytics.html

I'm starting to think you just have a Woodrow Wilson for Chinese goods, my pipes were equal length, metal was T304 stainless, merge collectors were the same, pre cats? Not a problem for the 2.5 people. The only thing I see is a higher price.

Look at them again . They probably seemed like they were longer, equal length primaries with a real merge collector. And, worse they were probably less than 1 5/8 in diameter .

I can't look at them, they ain't mine anymore, whatever Johnny, they improved the performance dramatically.

No, I have Fabspeeds. I assume Topspeed was refering to 6speedonline in his post, thats the go to place for bling mods!

Almost anything is better than that 3 hole flute they shipped it with

This thread is exhausting ! :cool:

Absolutely accurate prodriver. I go there when I need a good laugh. :)

Ya think? What a work of art...

My freudian slip is showing! I meant to say Topless. :cheers:

Shadrach74 They call that the "anti 911 cannibalism of sales" exhaust system.

Recall that you ears are only good for so many vibrations before you begin to ask people to repeat themselves. You get to choose what you spend those vibrations on and how long to extend your natural hearing.

Every time I pull up next to a car whose vibrations I can feel in mine with the windows closed I wonder at the choices people make. Same goes for loud motorcycles. Think those drivers will look cool with hearing aids?

And pollution controls are good for all of us, every time I hear of someone bypassing them, again I wonder. For a seldom used race car...sure. Can't be a fanatic or not have some fun. But for a car that is just going to the store? And I sure can't feel 6 HP difference in HP or whatever it is. Maybe its just the 'my pipe is bigger than yours' thing, da ya think?

Mike, I don't think anyone was advocating running catless on the street. It was a technical discussion based on my perception that some folks believe that the back pressure from catalytic converters actually broadens the power band. A properly designed exhaust system without cats will always produce more power than one with cats.

As for the noise, I share your disdain for overly loud pipes regardless of the vehicle. My town is plagued with Harley D-Bag wannabes on bikes so loud they will startle other drivers. While I find these riders terribly annoying, in the case of motorcycles, a certain amount of noise increases the awareness of other driver's to a cyclist's presence. As someone whose been street riding for 20 years, I'd prefer some noise over over quiet when riding a bike in traffic.

I think you're reaching, if my hearing goes it will be from draining the massive air compressor nightly at my dads for 20 years, that was the loudest thing I ever heard in my life. The headers on the 986 only really made it scream on the top end anyway.

PS You seen people with their Ipods at all? I can hear that $%^ ten feet away, what do you think that does to the tympanic membrane? Oh and lest us not forget that my neighbors have subwoofers louder than any exhaust I've ever heard. Considering their concert hall is a car cabin, I'll take my "risks" with the sport exhaust button. One more thing, if you're going to lose sleep over someone bypassing the cats, just lay your head down knowing that the EPA request to lower emission from coal plants was just kyboshed.

Will not add more horsepower, but stripping all the heavy stuff out will make it faster. Pull the not necessary parts of the interior, and install lighter racing seats.

And plenty of time at the track, autocrosses, and driving schools.