DIY Exhaust Mod – Gain of 10+ HP!!!

[sjbox]

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?

[KRAM36]

Originally Posted by sjbox

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?

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.

[01BOXYS]

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?

[chipmunk]

Originally Posted by 01BOXYS

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.

[01BOXYS]

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.