4IN. DOWN PIPE - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 08-18-2007, 06:53 AM Thread Starter
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4IN. DOWN PIPE

WOULD THERE BE ANY POWER TO GAIN OR LOWER EGTS BY SWITCH FROM A STOCK DOWN PIPE TO A 4IN. I ALREADY HAVE STACKS BUT MY EXHAUST GOES FROM 3 OR 3 1/2 TO 4IN THEN TO THE 5IN. STACKS I WANT TO MAKE IT ALL 4 INTO 5 WOULD THERE BE ANY BENEFITS FROM DOIN THIS I ALSO HAVE NO MUFFLERS

99.5 F-250 4X4 LARIAT
35IN. BFG KM2s
2.5 IN. LEVELING KIT
AEM AIR INTAKE
TS CHIP (TUNED BY MATT @ GEARHEAD)
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GARRETT 38R TURBO
6.0 INTERCOOLER
4IN. TURBO BACK EXHAUST
CSE FAB SINGLE BLACK 8IN. SLASH CUT STACK
CCV MOD
CSE PRE PUMP KIT
TRANNY COOLER WITH FAN
CSE FAB PORTED EXHAUST FLANGE
TIM MOYE TRANSMISSION
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post #2 of 7 Old 08-18-2007, 07:11 AM
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I would imagine your EGTs would drop, maybe a slight power increase as well. My EGTs dropped when I put my 4in down pipe on.
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post #3 of 7 Old 08-19-2007, 04:00 AM
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mine dropped when i switched to a 4" down pipe

IF CAPS ARE ON IM AT WORK I CANT TAKE THEM OFF
willypscustom cold air intake
4" exhaust straight piped
banks 6 gun
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post #4 of 7 Old 08-19-2007, 04:10 AM
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Yeah, should run cooler.


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post #5 of 7 Old 08-20-2007, 11:47 AM
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You wont feel anything seat of the pants but you will drop about 100 at max EGT.

01 F-250 SC PSD,320k,16 Isspro Gauges, AFE-2,CCV Mod,IAH delete,map reg,Modded H2e, 6.0 IC, 230/100 from P.I.S, Studs, 910 springs, Forged rods, Water injection,Hydra chip-No Limit/Gearhead tuning, Swamps HVHF IDM, MBRP 4" dual's, Aero, 6" tip's, 4" Revtek lift, 37/12.5/16.5 MT's
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post #6 of 7 Old 08-20-2007, 05:41 PM
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I just put on a 4'' turbo back saturday. The stock pipe was already straight. The only differance is the bottom end power seems smoother, lowered temp, and sounds better.
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post #7 of 7 Old 08-20-2007, 07:47 PM
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anyone know who i can get a 4" down pipe and mid pipe to my stacks


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