All Things Mk5 > Performance Modifications
Best exhaust system for gti
Paradox1:
Fit a downpipe.
Deeper tone, quite on idle for around town but an animal when you hit boost!
pudding:
Yeah I've got a downpipe + standard cat back on mine. I like it. Meatier at idle but OEM quiet every where else, which suits and old guffer like me.
I've noticed bugger all in terms of performance improvement though. Maybe my Stage 1 map needs tweaking a bit.
AJP:
--- Quote from: Pudding on October 28, 2016, 03:44:02 pm ---Yeah I've got a downpipe + standard cat back on mine. I like it. Meatier at idle but OEM quiet every where else, which suits and old guffer like me.
I've noticed bugger all in terms of performance improvement though. Maybe my Stage 1 map needs tweaking a bit.
--- End quote ---
Really? I noticed an immediate improvement when I had a full Powervalve fitted (even made the clutch slip). That was on the existing Stage 1 R-Tech map. After Stage 2 it felt like I gained the same again. In fact, from memory it went like this:
Stage 1 - 243bhp 296lb/ft
Stage 1 & exhaust - 260bhp 320lb/ft
Stage 2 & exhaust - 270bhp 345lb/ft
You should definitely feel some gain from the downpipe. As I understand it the vast majority of the restriction is from the downpipe/cat and not the catback section. But maybe that's not the case after all? What downpipe is it?
Flyingscotsman:
Save up for a BCS TB full system
AJP:
He's right you know.
All you guys umming and ahhing over downpipes, cats, whatever, just hold on until the new year (saving cash in the meantime) and I'm sure @Powervalve Nige will oblige another group buy.
That's what I did, and I'm so damn happy I waited. Apart from the power and torque gains I posted above (I've got graphs to show this if anyone's interested) the noise of the thing still puts a big smile on my face. In fact I've recently noticed something new; usually going from 3rd to 4th at full chat I'm now getting a nice 'POP' between gears. I'm on a Loba pump now so the extra grunt might be something to do with it. But whatever, it's mega. And I know it'll handle anything a k04 can throw at it when I go down that road. You get what you pay for.
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