XRDOSE BIGRED Donating Members 1,410 Member For: 17y 11m 16d Gender: Male Location: Sth East Melb Posted 02/12/08 09:46 PM Share Posted 02/12/08 09:46 PM Just want to know if im gona get a custom exhaust made up what should I get? ive seen some people get a 4inch dump and some get a 3.5inch dump with a seperate wategate pipe which is better? whats the difference? also is 5inch cat the best option? 3.5inch single pipe the rest of the way? What is the best metal to use? would this be an ideal exhaust for mid 300s? Link to comment Share on other sites More sharing options...
ETM Member 1,194 Member For: 17y 11m 26d Gender: Male Location: syd south Posted 02/12/08 10:11 PM Share Posted 02/12/08 10:11 PM my ute has a very good exhaust system, here is a run down.4" dump pipe off turbo, mild steel ceramic coated (keeps heat down a lot compared to stainless)external wastegate plumbed back (equivalent to seperate wastegate pipe on an internal gate housing)4"into 5" body hurricane metal cat3.5" 304 stainless 2.0mm wall mandrell bent system all the way2x magnaflow straight through mufflers, one is offset which is better for noise suppression.It sounds tough and will last longer than the car.Cheap chinese stainless exhausts sound tinny and are very thin 1.2mm wall thickness, imo they wont last very long at all. Link to comment Share on other sites More sharing options...
RAP1D Member Donating Members 3,739 Member For: 18y 9m 19d Gender: Male Location: Sydney NSW Posted 02/12/08 10:28 PM Share Posted 02/12/08 10:28 PM Yep Im with Leigh,Mines got a long 4inch dump into 5inch cat, 3.5 to the rear, and one Hooker 4inch straight through muff... it sounds nuts I made it all from mild steel, Im not fussed about getting too many years from it as I wont have it that long... but stainless is the way to go for lasting a long time. Link to comment Share on other sites More sharing options...
XRDOSE BIGRED Donating Members 1,410 Member For: 17y 11m 16d Gender: Male Location: Sth East Melb Posted 02/12/08 10:37 PM Author Share Posted 02/12/08 10:37 PM thanks for your input guys Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 1m 4d Gender: Male Location: SW Sydney Posted 02/12/08 11:43 PM Share Posted 02/12/08 11:43 PM You can specify for China to make exhausts with 2 or 3mm tube.... Link to comment Share on other sites More sharing options...
XRDOSE BIGRED Donating Members 1,410 Member For: 17y 11m 16d Gender: Male Location: Sth East Melb Posted 03/12/08 01:21 AM Author Share Posted 03/12/08 01:21 AM so anyone know if 4inch dump is better than 3.5inch with seperate wastegate pipe? Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 18y 1m 4d Gender: Male Location: SW Sydney Posted 03/12/08 01:29 AM Share Posted 03/12/08 01:29 AM Its a pretty big debate that one, kinda like the BOV vs No BOV debateThe general consensus is the the 3.5" split dump is better for response, but the 4" will give you better top end and ultimately more power potential - I'm going 4" on mine Link to comment Share on other sites More sharing options...
Adrian6T T.P.I.S. Donating Members 2,578 Member For: 20y 3m 8d Gender: Male Location: SoR, WA Posted 03/12/08 01:43 AM Share Posted 03/12/08 01:43 AM Its a pretty big debate that one, kinda like the BOV vs No BOV debateThe general consensus is the the 3.5" split dump is better for response, but the 4" will give you better top end and ultimately more power potential - I'm going 4" on mine So am I. Link to comment Share on other sites More sharing options...
Guest Guests Posted 03/12/08 01:52 AM Share Posted 03/12/08 01:52 AM Pat nailed it on the head... 3.5" split dump is better low down whereas 4" is better for top end I've got a SMB 4" dump, 5" bodied cat & 4" cat back system on my sedan in stainless. Sounds horn & produced the performance I was after. Link to comment Share on other sites More sharing options...
Tocchi Sandtrap Motorsport Donating Members 2,055 Member For: 16y 3m 14d Gender: Male Location: Perth Posted 03/12/08 02:09 AM Share Posted 03/12/08 02:09 AM what about 4" with split dump? Link to comment Share on other sites More sharing options...
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