You can always tune your exhaust to your personal liking here:

https://www.youtube.com/watch?v=xjZeul6iuiM

Just sayin'.............;)

TO

as long as you are not injecting fresh air into the exhaust system to dilute the exhaust gases you should be OK. All this mod does is bypass part of the muffler

Haven't laughed that hard in a long time.... thanks for sharing, now I know what to do when I feel depressed :cheers:

I did it, sounds better, but drone I got is making me look for other options.

Sounds better, but slight drone.

Hayward & Scott exhaust modification
 

For those in the UK that feel the factory standard exhaust is a little too subdued, Hayward and Scott do a superb "bypass" modification which replicates the factory switchable sports exhaust tone -

Porsche 996 and 987 Boxster Stainless Steel Exhausts - Hayward and Scott

You can either drive your car to them and have your existing backbox modified or send them another backbox (like I did) and they mod. it and send it back in a few days ready to be fitted. That way you get to keep the original just in case you or the next owner don't like the finished result! The sound is gorgeous, rich and rumbly but no resonance or droning at cruising speeds. Really reasonable cost as well compared to other sports exhaust options.

Carried out this mod yesterday and took her for a blast this morning, can't say the exhaust is much louder but there's definately a frequency change, noticeably below 3000 rpm, almost BMW note to the exhaust, especially a 3L beemer..... went to 13mm diameter on both sides with no drone and the ocassional blip and fart on overrun......what a ******************** to get the tailpipe bolt off from underneath...... she's a 2.7 so not welded on...pretty pleased overall :)

You're pleased you made your Porsche sound like a Beemer? Isn't that a step backwards?

He's working his way up (or down) to the exhaust note of a HOnda Civic with the tomato can muffler, lol.:barf:

Hilarious.....my M3 had the same exhaust note, quite deep.....nothing like a rice rocket......but thanks for your comments all the same chaps:rolleyes:

This is a great mod. Sounds great and no drawbacks.

Don't take it personal, Skoosh. ;)

I finally got out the extra-long drill bits and gave it a try. I went with 3/8" holes (9mm) because that is the largest reamer size I have.

The effect is subtle but pleasant. I can now hear some engine noise over the whine of the belts and transmission, but it's nothing the neighbors are going to complain about, or even notice. I'd say I got 10dp (dogpower) increase, max. Maybe.

Box muffler reconstruction
 

I was wandering if the "angle" of the hole makes a difference in the sound. Such as bending the lip nearest the rear inward to catch more exhaust. Thought maybe that would help a smaller hole (avoid the drone) pick up more exhaust consequently more sound? Anyone tried it??

I have drilled a one inch hole in both sides and have NO hint of a drone.

I drilled used a .50 bit and then opened it up a bit more to around .75 inches.
Sounds great I don't know about the HP but it leaves things "stock" visually for the CA smog test.

Only difference I notice is below 3k rpms and it's a drone. I'm not personally a fan of this mod, but gave me something to do this afternoon.

OK champ.. sorry to get here this late in the game of frustration. i have a non- S 1999. in the case of my muffler, the reason you were NOT getting a difference in sound is because the CHAMBER is already OPEN to the front and outside, right between the 2 exhausting pipes....so you are not making a difference by drilling again, UNLESS the drilling was significantly larger than suggested by CRIOS...(my new hero BTW). Don't have pics, again, at least in my case, that is what i found. the CENTER chamber is NOT sealed as in the case of the pics shown by CRIOS.

Here's my sound check.

https://www.youtube.com/watch?v=6Zqx5l-cOoY

Dzl210, that sounds good -- sporty but not obnoxiously loud. What size holes did you make?

I did this to my car today, except I used too long of a drill bit and went all the way through the muffler.

Actually sounds pretty good lol

Wow that must have been a long bit :eek:

Wanted to make sure I got far enough into the muffler lol.

Craftsman 1/2 in. Extra-Long Drill Bit - Tools - Power Tool Accessories - Drill Bits

How long is it? I used a multi bit on a 12 inch extension and had just enough length to drill the hole. Are you saying you went thru the pipe and out the muffler somewhere?

Just borrow your wife's 45 magnum mate, does the same trick :D

A mod done in 0.0023 second

Yep, I sure did. I was counting the number of times the drill bit would hit metal after cutting after the first opening. I figured 3 times would be it. Didn't realize til afterwords that you actually go under the first pipe in the picture.

I got my 3 hits, right out the backside of the muffler. :D

The tip on my '02 non-S Boxster is welded. I got myself the extra long 1/2" drill bit from Sears and managed to punch a hole on one side with a long screwdriver but just couldn't get the 1/2" bit to bite :( The screwdriver hole is shaped like the screwdriver's flat end and the drill bit wants something circular so no go (and, I am not very skilled at wielding a drill).

Tried to drill a pilot hole with a smaller bit and broke it and then couldn't find the broken end!! Hope it doesn't shoot out like a projectile on the freeway.

Maybe I need to get a smaller extra long drill bit to first drill a pilot hole?

I did not feel like buying a corded drill to do this for mine so what I did is just used the long 1/2 inch drill bit and just used a hammer to punch holes. Took a little longer but with the welded oval tip and a cordless drill this was the easiest way for me to get the holes in there. No one will ever be low enough to see my holes are not perfectly round so I was happy with it.

Can you turn the screwdriver 90 degrees and punch a perpendicular slot? I'm thinking if you get a + shape, the bit should setting into the crossing and drill. (Or, maybe, just use a Philips screwdriver?)

Muscle, you have to use muscle to keep the drill bit from bouncing around. My drill bit was bouncing around and I just laid the muscle to it. Just don't go all the way out the backside like I did lol.

I just want to clarify that you just need to punch a hole in the same position as Crios and Particlewave mention then using the drill bit step up to the size you want to achieve? You don't have to drill any further into the muffler than just the hole?

Just drill through the pipe - one layer only. This allows the exhaust to bypass several of the chambers. The bigger the hole the more exhaust bypasses and the louder it gets. Don't go bigger than 25mm or you get resonance.

Great thank you for quick response! I plan on doing this mod tonight and can't wait to give my Boxster S a little more attitude.

Have a look on this thread for the links to the YouTube videos I posted demonstrating the different sound for different hole sizes.

I did this ~5 years ago on my 1999 and today I went to do it on my 2000 S. We drilled two perfect 3/4 inch holes and I can't hear any difference at any RPM. I still have my 99 so I looked in and it looks like I had pierced the center pipe in chamber three. As other have pointed out that seems more consistence with the PSE bypassing a lot of the Muffler.

Those of you who are raving about this did you pierce the center tube? I don't want to just keep drilling larger holes in the curved pipes if its not going to make any difference.

For the 3.2 S engine folks out there....
 

...who have done this mod, how about a progress report now that you have a few years with this mod under your belts?

Pretty please?

Thanks!

I drilled 10mm (3/8") holes in both sides of the muffler on my 2002 S. It increased the bass rumble, but didn't turn it into a snarling beast. I have gotten a couple of comments on this, but it's a subtle change.

I have 2x 3/4" holes and they didn't make much difference UNTIL I put on the 2nd cat delete pipes! Opened up the air and noise much better. No drone and a little grumble on the downshift!

An S owner chiming in...
 

I drilled 1/2" holes in mine. I have a mild snarl added to the exhaust note plus a bit more volume.
Not over the top by any means, just enough.

For anyone who has a hard time starting the drill bit, I used a hammer and a long shaft straight blade screwdriver to punch through the pipe first so the drill could bite and wouldn't wander all over.

Did this mod today. My 02 exhaust tip is welded but with a $13 1/2" bit from Home Depot I managed. I like the effect but too much of a coward to go bigger than 1/2" without a reserve muffer on hand. I am sensitive to drone and so far so good but I do wish it was a bit louder.

Just wondering now that some time has passed, is everyone still happy with their choice of drilling out? Some other sites were saying it made the boxster sound more like a japanese car which is fine if that is what you want.

Thanks,

David