magnex 421 race

1. Pug106-GTI Frequent Poster Joined: Apr 2010 Kent Posts: 755

   #1 2nd June 2010, 01:38

   has anyone got a straight through exhaust system with a twin magnex backbox
   
   i got a 421 manifold and a magnex cat back exhaust system but thinking oh using my 421 with a supersprint race section and my magnex backbox
   
   does anyone have this if so wat does it sound like comments welcome
2. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #2 2nd June 2010, 08:04

   if your going turbo wait and get a custom exhaust made up
3. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #3 2nd June 2010, 08:08

   +1 don't spend money on a magnex/supersprint system as you'll need a bigger bore exhaust for boost
4. Pug106-GTI Frequent Poster Joined: Apr 2010 Kent Posts: 755

   #4 2nd June 2010, 09:14

   ok mate, but that may not be till the end of this year was just going to try squeeze a little extra power out of my gti before i turbo it and put it on the dyno etc
5. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #5 2nd June 2010, 09:17

   I would honestly try and save as much as possible so you can get the most reliable turbo setup you can afford.
   
   In reality there isn't huge gains to be had across the different types of aftermarket exhausts. With this in mind I'd keep your current setup
6. Pug106-GTI Frequent Poster Joined: Apr 2010 Kent Posts: 755

   #6 2nd June 2010, 09:20

   ok thanks for the advice mate
   
   for my turbo setup im thinking about dp manifold and downpipe, 490cc pico injectors from racetonix, t25/gt25 turbo, wossner pistons and pec rods, 2.25" piping and medium size intercooler then custom 2.5" bore exhaust system and then possibly predator ecu with lc-1 wideband
   
   do you think this should be pretty reliable?
7. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #7 2nd June 2010, 09:28

   Yeh sounds good to me.
   
   You'll want a clutch to cope with that and a quaife atb to try and make your gearbox reliable.
8. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #8 2nd June 2010, 21:40

   ideally you want a 3" exhaust not 2.5