Gutted Pre-CATs vs New Downpipes
Gutted Pre-CATs vs New Downpipes
Costs the cost difference fitted? Thinking out loud really, the down pipes should be dead simple so would it be a cheaper or better option to buy 3" cat free downpipes rather than getting the factory ones gutted?
RE: Gutted Pre-CATs vs New Downpipes
here in Italy Supersprint charges 1600 Euro for DPs(70mm) with 100cpi main cats and no pre-cats.
It's a STEAL.
I'd go with gutted dps.......
It's a STEAL.
I'd go with gutted dps.......
Rs4 b5 06/2001
custom remap - KW V3 - Hotchkis Sways - ASP DTS with poly mount - 034 Street Mounts + Snub with bracket - Apikol rear diff mount and bushes - Gutted precats - DUH Fmic kit - 360x32 floating discs+brembo 6-pot at the front - 710Ns - OEM 18 Hard wheels - JHM shifter/linkage/spring etc - Podi.ca Boost Gauge - Powerflex Bushes - Afterrun mod -
custom remap - KW V3 - Hotchkis Sways - ASP DTS with poly mount - 034 Street Mounts + Snub with bracket - Apikol rear diff mount and bushes - Gutted precats - DUH Fmic kit - 360x32 floating discs+brembo 6-pot at the front - 710Ns - OEM 18 Hard wheels - JHM shifter/linkage/spring etc - Podi.ca Boost Gauge - Powerflex Bushes - Afterrun mod -
- mikeyquattro
- Top Gear
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RE: Gutted Pre-CATs vs New Downpipes
After talking to Steph, I'd go with gutted pre cats. He's fitted catless d/p's and has lost torque but gained h/p. imo torque is better!
Tomorrow is another day
RE: Gutted Pre-CATs vs New Downpipes
mine have just been de-cated.... labour is the same regardles but add cost of new downpipes and you start to get exapensive needlessly.
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- 5th Gear
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RE: Gutted Pre-CATs vs New Downpipes
if you take out the main cats the car will be a lot louder and the extra heat may burn out the silencer packing depending what it is. thats what happened to mine anyway 

665 bhp + 586 lbft...
http://www.youtube.com/watch?v=woZe0A1vHAI
http://www.youtube.com/watch?v=woZe0A1vHAI
- quattrosteph
- 4th Gear
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- Joined: Mon Jan 23, 2006 10:23 pm
Gutted precats is the most effective mod
The gain of power+torque make it really interesting
Straight through pipes are good (i have them) but if i had to chose again i would go for 3" downpipes.....
Gutted oem precats are more noisy than straigh through pipes.


Straight through pipes are good (i have them) but if i had to chose again i would go for 3" downpipes.....
Gutted oem precats are more noisy than straigh through pipes.
Porsche 996 Turbo S Atlas Grey.
RS4 B7 Avant Sprint Blue. Sold.
RS4 B5 Avus Silver with MRC magic . Sold (Best car ever )
S4 B6 Avant Nogaro blue. Sold
A6 Avant Silver . 2.5 TDI .Sold
RS4 B7 Avant Sprint Blue. Sold.
RS4 B5 Avus Silver with MRC magic . Sold (Best car ever )
S4 B6 Avant Nogaro blue. Sold
A6 Avant Silver . 2.5 TDI .Sold
- quattrosteph
- 4th Gear
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- Joined: Mon Jan 23, 2006 10:23 pm
And Jimbo is right , by using the straight through pipes you can have some troubles with the silencers
due to increase of heat passing through them......
Always the same story.....Do one mod and it has an effect on something else!!!!! But we love mods aren't we??

Always the same story.....Do one mod and it has an effect on something else!!!!! But we love mods aren't we??

Porsche 996 Turbo S Atlas Grey.
RS4 B7 Avant Sprint Blue. Sold.
RS4 B5 Avus Silver with MRC magic . Sold (Best car ever )
S4 B6 Avant Nogaro blue. Sold
A6 Avant Silver . 2.5 TDI .Sold
RS4 B7 Avant Sprint Blue. Sold.
RS4 B5 Avus Silver with MRC magic . Sold (Best car ever )
S4 B6 Avant Nogaro blue. Sold
A6 Avant Silver . 2.5 TDI .Sold
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