QUESTION: Straight midpipe or X-pipe w/connecting pipes?

jahmed78 · 02-18-2011, 12:48 AM

I'm about to get a Procede tune and I'm currently running stock downpipes, midpipes, and a Remus race axle-back exhaust.

I understand downpipes are a great upgrade for performance but I defintely won't pass smog. So I'm thinking about freeing up some air flow in the mid section and getting a better sound by replacing the stock midpipe which has the secondary cats and resonator.

Do I go with straight midpipes (Borla or SuperSprint) or an X-pipe with connecting pipes? I'm not sure what the diff would be but the x-pipe set up is more expensive?

michaelthepsycho · 02-18-2011, 12:55 AM

Straight. No point trying to scavenge when increased flow will help relieve turbo stress.

gaifaun · 02-18-2011, 01:45 AM

effects are minimal so go with straight pipes; its cheaper too

jahmed78 · 02-18-2011, 01:55 AM

any recommendations on a brand of straight pipes?

gaifaun · 02-18-2011, 01:59 AM

go to your muffler shop and get custom pipes!

no one blows $300 on borla or RR midpipes

jahmed78 · 02-18-2011, 02:01 AM

how much would that cost?

gaifaun · 02-18-2011, 03:40 AM

if you are just cutting exactly where the secondary cats are, and welding straight pipes on then its gonna be like what? $60 bucks?

if you are bending new pipes from the downpipe to the secondary cats (basically creating your own midpipes) it would cost you around $150-200?

02-18-2011, 12:48 AM	#1
jahmed78 Second Lieutenant 45 Rep 299 Posts Drives: 2007 BMW e90 335i Join Date: Oct 2010 Location: San Diego, CA iTrader: (6)	QUESTION: Straight midpipe or X-pipe w/connecting pipes? I'm about to get a Procede tune and I'm currently running stock downpipes, midpipes, and a Remus race axle-back exhaust. I understand downpipes are a great upgrade for performance but I defintely won't pass smog. So I'm thinking about freeing up some air flow in the mid section and getting a better sound by replacing the stock midpipe which has the secondary cats and resonator. Do I go with straight midpipes (Borla or SuperSprint) or an X-pipe with connecting pipes? I'm not sure what the diff would be but the x-pipe set up is more expensive? __________________ 2007 335i e90 - black on black w/wood trim and iDrive 19" BMW M-Performance wheels, ST coilovers, m3 rep front bumper and skirts, CF Hamann rep diffuser, Remus Race quad exhaust, aFe DCI, LED angel eyes & DRL kit,
	Appreciate 0 Tweet Quote

02-18-2011, 12:55 AM	#2
michaelthepsycho Lieutenant Colonel 76 Rep 1,644 Posts Drives: 11 Montego Blue E90 335i Step Join Date: May 2009 Location: CA iTrader: (4)	Straight. No point trying to scavenge when increased flow will help relieve turbo stress. __________________ Former car 2011 BMW 335i Step - Montego Blue / Chestnut Brown
	Appreciate 0 Quote

02-18-2011, 01:45 AM	#3
gaifaun Major 206 Rep 1,134 Posts Drives: E90 335i LCI Join Date: Apr 2007 Location: Greater Vancouver iTrader: (14) Garage List 2010 E90 335i LCI [10.00]	effects are minimal so go with straight pipes; its cheaper too __________________ I can help with Coding in Vancouver. PM me
	Appreciate 0 Quote

02-18-2011, 01:55 AM	#4
jahmed78 Second Lieutenant 45 Rep 299 Posts Drives: 2007 BMW e90 335i Join Date: Oct 2010 Location: San Diego, CA iTrader: (6)	any recommendations on a brand of straight pipes? __________________ 2007 335i e90 - black on black w/wood trim and iDrive 19" BMW M-Performance wheels, ST coilovers, m3 rep front bumper and skirts, CF Hamann rep diffuser, Remus Race quad exhaust, aFe DCI, LED angel eyes & DRL kit,
	Appreciate 0 Quote

02-18-2011, 01:59 AM	#5
gaifaun Major 206 Rep 1,134 Posts Drives: E90 335i LCI Join Date: Apr 2007 Location: Greater Vancouver iTrader: (14) Garage List 2010 E90 335i LCI [10.00]	go to your muffler shop and get custom pipes! no one blows $300 on borla or RR midpipes __________________ I can help with Coding in Vancouver. PM me
	Appreciate 0 Quote

02-18-2011, 02:01 AM	#6
jahmed78 Second Lieutenant 45 Rep 299 Posts Drives: 2007 BMW e90 335i Join Date: Oct 2010 Location: San Diego, CA iTrader: (6)	how much would that cost? __________________ 2007 335i e90 - black on black w/wood trim and iDrive 19" BMW M-Performance wheels, ST coilovers, m3 rep front bumper and skirts, CF Hamann rep diffuser, Remus Race quad exhaust, aFe DCI, LED angel eyes & DRL kit,
	Appreciate 0 Quote

02-18-2011, 03:40 AM	#7
gaifaun Major 206 Rep 1,134 Posts Drives: E90 335i LCI Join Date: Apr 2007 Location: Greater Vancouver iTrader: (14) Garage List 2010 E90 335i LCI [10.00]	if you are just cutting exactly where the secondary cats are, and welding straight pipes on then its gonna be like what? $60 bucks? if you are bending new pipes from the downpipe to the secondary cats (basically creating your own midpipes) it would cost you around $150-200? __________________ I can help with Coding in Vancouver. PM me
	Appreciate 0 Quote