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Old 7th November 2019, 01:18 AM   #1 (permalink)
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Stage 5 with oem cat back exhaust

Hi all

I want to order the Litchfield hardware and have it installed on a 2017 Track Edition. I would like to keep the stock appearance and would rather not have a loud exhaust.

Can a stage 5 be performed with the stock cat back exhaust or even better the stock down pipes as well (changing only the mid)



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Old 9th November 2019, 12:08 AM   #2 (permalink)
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Why don’t you call Litchfield and have a chat with Iain or Neil really nice helpful chaps
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Old 9th November 2019, 12:22 AM   #3 (permalink)
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Just use sports cat downpipes with triple silencer system, job done.
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Old 9th November 2019, 10:17 AM   #4 (permalink)
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my whifbitz 102mm system with silenced y pipe and catless down pipes is exactly the same sound level as the complete stock system with an un res y pipe fitted
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Old 9th November 2019, 03:48 PM   #5 (permalink)
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The 5 resonater silenced 102mm is as quiet on idle as OEM.. appearance'wise it uses the same tail pipes.

The OEM backbox (non valved DBA) was rated to 800hp, the 2017 valved oem exhausts are even more restrictive.
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Old 9th November 2019, 04:24 PM   #6 (permalink)
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my whifbitz 102mm system with silenced y pipe and catless down pipes is exactly the same sound level as the complete stock system with an un res y pipe fitted
I highly doubt that

I also have the whifbitz 102mm, catless downpipes but additionally 2 big ass 200 cell cats in the y-pipe. It is noticably louder than my stock exhaust+y-pipe I had before, idle and wot.
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Old 9th November 2019, 04:27 PM   #7 (permalink)
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Just use sports cat downpipes with triple silencer system, job done.

I would (and did) install sports cats into the y pipe rather than the downpipes. Seems that sports cats can't handle the heat right after the turbos and many had their aftermarked cats, fail sooner or later, because of this.
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Old 9th November 2019, 05:45 PM   #8 (permalink)
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The rear section doesn't actually silence that much, so you would be better off with a full aftermarket system, that has multiple silencers. I'm also not sure what Litchfields thoughts would be on tuning that far with the valved Nissan system in place.

I'd suggest the triple silenced Litchfield system. I believe it uses the stock tailpipes and is pretty quiet.

you could probably leave the stock cats / downpipes in but the best would be catless downpipes with the sports cats in the Y pipe.

The guys at Litchfield will be able to help for sure.
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Old 10th November 2019, 06:05 AM   #9 (permalink)
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I would (and did) install sports cats into the y pipe rather than the downpipes.
How are they holding up?
Pass MOT emissions testing and no fuel smell?
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Old 10th November 2019, 08:41 AM   #10 (permalink)
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What companies supply sports catted downpipes?

Cobb do a 200cell version
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Old 10th November 2019, 09:41 AM   #11 (permalink)
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The rear section doesn't actually silence that much, so you would be better off with a full aftermarket system, that has multiple silencers. I'm also not sure what Litchfields thoughts would be on tuning that far with the valved Nissan system in place.

I'd suggest the triple silenced Litchfield system. I believe it uses the stock tailpipes and is pretty quiet.

you could probably leave the stock cats / downpipes in but the best would be catless downpipes with the sports cats in the Y pipe.

The guys at Litchfield will be able to help for sure.
Thank you, if it uses the oem rear section that would be perfect.

Hopeing to get to the UK for a conference early next year and will take a day off and visit Litchfield. I like there front lip and carbon rear section (not sure exactly how this rear piece is fitted)

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