tuning...spartan. s&b and 4 inch turbo back - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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Old 10-08-2013, 09:24 PM
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tuning...spartan. s&b and 4 inch turbo back

underway.
should i step up to a 5 inch exhaust? any benefits?
i was gonna order from river city diesal

Spartan Diesel Phalanx Console
Transmission: Automatic_Transmission
DPF & CAT Delete Kits: SDT-6.4 PHLX $1 499.00 $1 499.00
6.4L Ford 2008-2010 S&B Cold Air Intake Kit
Filter Type: Oiled_Filter SBF75-5054 $289.00 $289.00
6.4L 4" Stainless Steel Turbo Back Exhaust w/ 5" Tip
RCD-6.4 TB Exhaust $599.99 $599.99
Subtotal: $2 387.99

Total: $2 387.99

what you guys think
2008 f250 Harley
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Old 10-09-2013, 04:53 AM
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I love my 5 inch, after havign 4 on my 6.0 I wish I had 5.0 on that too. Would never go back down. Plus that's a killer price on the exhaust, so step it up!
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Old 10-09-2013, 08:27 AM
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No benefits from 4" to 5"
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Old 10-09-2013, 11:06 AM
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Going 5 inch with the stock down pipe.
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Old 10-09-2013, 01:19 PM
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Why would you do that? You just went backwards from your first setup. There is a lot of benefits to aftermarket 4" downpipe vs stock downpipe
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Old 10-09-2013, 01:31 PM
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Quote:
Originally Posted by WoodBoy View Post
Why would you do that? You just went backwards from your first setup. There is a lot of benefits to aftermarket 4" downpipe vs stock downpipe

Well Im doing the work myself and just crawled under the truck. Looks like a pain to take out the stock downpipe and looks pretty massive as it is. 4 inch stock I believe, looked that way. I also dont want problems down the road with the aftermarket downpipe.
What are the gains with the upgraded downpipe anyway?
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Old 10-09-2013, 05:20 PM
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The stock downpipe is EXTREMELY restrictive. When you go to take it off it tells you to "CUT" into 2 pieces, at that point you will see how useless the stock DP is. I went with the MBRP 4" downpipe and matched it with the 4" turbo back. Love it low egts great sound. i would recommend that you reconsider running the stock DP with the 5" exhaust, you will gain absolutely nothing but sound by running it the way you plan.
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Old 10-09-2013, 05:24 PM
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Quote:
Originally Posted by CraZee Powerstroke View Post
Well Im doing the work myself and just crawled under the truck. Looks like a pain to take out the stock downpipe and looks pretty massive as it is. 4 inch stock I believe, looked that way. I also dont want problems down the road with the aftermarket downpipe.
What are the gains with the upgraded downpipe anyway?
As stated the stock down pipe is restrictive. It isn't hard to remove at all. You cut in half and if you ever had to return to stock, the stock exhaust bolts up to the aftermarket downpipe. (As long as it is the ball/socket style end which most are). The stock downpipe is crimped by the frame and is also double walled so that it isn't 4" either
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Old 10-09-2013, 09:22 PM
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Its crimped by the frame so it doesnt rub or have problems with the frame. Are you guys having no issues with the aftermarket downpipes? Ill reconsider. 4 inch dp with 5inch
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Old 10-10-2013, 06:49 AM
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We know why it's crimped. You are welcome to do whatever you want for your truck and we don't make recommendations that don't work
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