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  #1  
Old 07-07-2015, 01:36 PM
KevP84 KevP84 is offline
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Default Decat or sports cat
Currently i have a completely standard jdm spec blob sti.
im aiming for 350-400bhp, just cant decide wether sports cat or decat.

will be ordering a new fuel pump come payday from scoobyworx.

any input welcome
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  #2  
Old 07-07-2015, 01:39 PM
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De cat that's I'm putting on my blob if we still have it lol .
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  #3  
Old 07-07-2015, 03:35 PM
KevP84 KevP84 is offline
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guess it means i probably should start a project thread when i get a chance
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  #4  
Old 07-07-2015, 03:51 PM
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If you know a friendly MOT tester - then Decat - if not - then sports cat...

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  #5  
Old 07-07-2015, 09:15 PM
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A decatted car cannot pass a roadside test or MOT therefore is effectively illegal and could invalidate insurance etc. A good sports cat will see you well over 400bhp, mine is at 450 and passes MOT and roadside emissions tests.
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Old 08-07-2015, 08:56 AM
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I was going to go full decat but then i got stopped at a VOSA/police checkpoint completely randomly. Luckily only had cat back system in. They checked loads of things. Tyres, exhaust, my licence, insurance. This was just on the A24 a few weeks ago.
Chances of getting stopped are very slim....... BUT......... makes you think! Worst case scenario you get stopped and you have a decat on thats going to fail, voiding the MOT, Voiding your insurance. The police let the insurer know, they cancel your policy, you then need to tell your next insurance provider you had a policy cancelled. It wont look good. Plus the fine and drama of it all. Not 100% sure on the gain difference i think its like 3bhp and a tiny amount or torque.
I am going sports cat, that will pass fine.
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  #7  
Old 08-07-2015, 08:57 AM
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perhaps I should clarify - I also went sports cat as didn't want to be illegal - but know others who are fully decat e.t.c.
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  #8  
Old 08-07-2015, 09:03 AM
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You can fail MOT if cats are missing on a visual inspection now as well I believe.
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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  #9  
Old 08-07-2015, 09:23 AM
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Thats correct BlueBugEye.
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  #10  
Old 08-07-2015, 09:24 AM
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I went decat on the hawk and while the car was transformed it did have its down sides.

1. Faffing around at MOT time
2. Possibility that it could void MOT/Insurance. Mine was declared but all it stated on the insurance papers was 'exhaust modifications'. A grey area.
3. Noise. Sounded great on a sunday morning going to a meet. Got annoying every other day (I must be getting old)
4. The Smell. Definitely smellier inside the car and out.

If I were doing it again I would go sports cat. You may loose a little power or particularly torque but probably not noticeable and avoid all of the above.
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  #11  
Old 08-07-2015, 09:35 AM
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I should add my car was a daily and used for work. I guess if it was a second car and garaged I may have looked at it a bit differently.
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  #12  
Old 08-07-2015, 01:19 PM
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My Impreza has the Miltek Sports Cat 3' system with the Sports Cat in the mid section, I have also removed the Up-Pipe Cat as the car is now effectively an STI which never had them anyway.
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
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  #13  
Old 08-07-2015, 03:44 PM
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Or get a pre-94 import that doesn't need one
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