KrayzieFox
Member
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- 01 MP3 Turbo
MAM replica would be great 
GI: Replacement exhaust manifold
- Thread starter thepope540
- Start date
_MSprotegy
Member
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- 03 MSP & 06 MS6
Stock replacement please. My thunder manifold is on its last leg. I've had the damn thing rewelded for a third time.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Do you have any flex in your exhaust? I'm not going to go to bat for thunder, but manifolds don't generally crack like that unless they are put through some serious stress.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Yep, the downpipe will be kept the same.
KrayzieFox
Member
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- 01 MP3 Turbo
The Thunders ALL cracked at some point, it's just poor design or poor welds or poor materials.. or all of the above. They came from Taiwan and were like $300 some bucks new, that should tell us everything.
_MSprotegy
Member
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- 03 MSP & 06 MS6
yes there is a flex section in the exhaust. I just know that the piping that thunder racing used was thin walled.
EEYOrE7763
Member
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- 2003 Mazda Protege LX
A tubular stock replacement manifold is going to cater to those running gt25, discos, gt2871s and gt3071r's so they won't be too slow. You can make a lot of power with these turbos and a tubular stock high flowing replacement will only help yield the highest amount of flow and power while enabling those who have already own toms dp to reap all the benefits.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Gotcha. Maybe I'll use 14 gauge or weld els rather than the 16 gauge I use on the downpipes.
Here's a question.... 304SS or 409SS? 409 is stronger and less likely to crack, but it won't take a shine and can even get a little rusty looking in some environments. It will never rust out it just won't look as nice. 304SS can be polished and is a great material, but I'm leaning toward 409 for this application. Plus 409 is cheaper
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- 03.5 YLW MSP
The reason why I was a EWG setup over the WGA bs is that I've already replaced 6 WGA and tired of messing with them. Plus you get a faster spool or well responce and better boost controll with ewg's over wga
You can always just cap it off if that a issue.
Gotcha. Maybe I'll use 14 gauge or weld els rather than the 16 gauge I use on the downpipes.
Here's a question.... 304SS or 409SS? 409 is stronger and less likely to crack, but it won't take a shine and can even get a little rusty looking in some environments. It will never rust out it just won't look as nice. 304SS can be polished and is a great material, but I'm leaning toward 409 for this application. Plus 409 is cheaper
I can live with a rusty look as long as it doesnt rust out. Plus I can always get the mani coated
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2.0t03speed
Member
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- 08.5 CWP Speed 3
To get a EWG on a t2 series turbo your are going to have to do one of 2 things. A. get the flapper welded shut. Or B. Leave your internal wastegate hooked up and just don't run a vac line to it so it holds the flapper shut all the time.
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- 03.5 YLW MSP
+1 and already planned on just leaving the wga attached to the turbo tl hold the flap shut
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- 2003 mazdaspeed protege
+1 on the 409s.
EEYOrE7763
Member
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- 2003 Mazda Protege LX
+1 for 409... We can still get it ceramic coated.
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- 1989 RX-7 GXL Blaze Red
Im going to chime in and say 321 or 316 SS.
304 SS will probably be the better choice though.
Edit: Honestly 304 with 321 welding rod would be perfect.
304 SS will probably be the better choice though.
Edit: Honestly 304 with 321 welding rod would be perfect.
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EEYOrE7763
Member
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- 2003 Mazda Protege LX
I would say leave it internal waste gate actuator because they make t25 turbine housings with 38mm v band outlets. I've seen them at atpturbo.com
