DC Sports Header install and evaluation - Page 12 - Toyota Yaris Forums

SirDigby · 04-24-2017, 12:21 AM

i'd say, "you get what you pay for" in most cases. cheap manifolds usually don't line up just perfect or have the best geometry or welds. i had an obx on my civic for over 200,000 miles without any issue. ($50) but, i'm also a cheap-ass and look for a better deal, and the complete exhaust was custom, so it did not matter if it lined up when purchased. i would not pay $500-$1000 for a TRD seeing how the gain is so minimal.
i do disagree with the 4-2-1 vs 4-1 for performance stated above. 4-1 manifold gives a better top end torque because of where the collector location is in reference to pressure point of cylinder pressure drop during high rpm. (high rpm=high pressure scavenging further in the tube) 4-2-1 allows high pressure scavenging to occur at lower rpm, between sister cylinders; wile high rpm scavenging still occurs, but at lower pressure, so it has a less dramatic effect on high end performance. since i do a lot of city driving, the most noticeable gains should live in the 500-3500 range. (4-2-1)
i do not believe there is a "better" design, i think it all depends on where in the RPM range you want the gains to be most noticeable. in the civic, i was driving from denver to phoenix every weekend. (1500 miles r/t) the obx was a 4-1 because it was always on the highway running as fast as possible. it all depends on your utility.

williew2 · 04-24-2017, 12:26 AM

Quote:

Originally Posted by tarkus

So just for example, does this one look legit?

http://vi.raptor.ebaydesc.com/ws/eBa...=1492913724413

Or maybe this one?

http://m.ebay.ca/itm/06-09-YARIS-1-5...ATCHING_ACTIVE

Sent from my phone with Tapatalk. Please excuse any typpos.

I have the second one, fit up to the engine fine, only issue is they are a tad longer and cause the cat converter to bump on the x-member, nothing a bit of tweaking won't fix tho. They seem O.K for the $$$ and since I'm in Australia I need cheap as freight almost doubled the price.

JimKellyfan · 07-03-2017, 11:09 PM

I am trying to determine which header for me. I do highway, but also like my low end. I am steering to a 4-2-1, or like design, but think the tubes should be bigger/posters had some copied/pasted sizes below.

Tolmach ^ Mine measure 31 mm = 1.22 inches

Golddeenoh Tolmach, your pipes look kind of small as well but then again my Megan Racing header is 3mm larger diameter but i wouldn't think that i could tell the size difference in a picture with out side by side comparison.

Tooter The inside diameter of stock 2012 header runners is 28mm and the Weapon R's are 36mm...

Xnamerxx I measured 35mm for the port and 40mm for the gasket.

So, for the ceramic coating is nice, but T409 is not as super duty as T304, at least what someone typed online here:
http://www.autoanything.com/exhausts...s/t304-vs-t409

I was leaning towards OBX as their claim is 1 3/4 primaries which is 44 mm.
It looks like the stock, so it won't have the lower end lacking, as not as much high end as the DC.

Looking at sellers sites, it is hard to see all the sizes, they don't have em, really. I think 1 3/4 is a big boast, hopefully Amazon is right.

For now, I will await other replies, but based on research so far, am leaning to the OBX for the steel type too, the T304 besides the bigger tubes and similar construction to a 4-2-1 set up or stock set up....

Thoughts and sizes anyone ?

JimKellyfan · 07-04-2017, 06:40 AM

Ordered OBX header and TC TB spacer off Amazon. Buying two items off Amazon from OBX netted me 33 bucks off and was 12% their math. Was 199.99 and 74.99 before discount.

07-03-2017, 11:09 PM	#201
JimKellyfan Drives: 2010 Yaris Sedan Join Date: Oct 2013 Location: the good Carolina Posts: 173	sizing I am trying to determine which header for me. I do highway, but also like my low end. I am steering to a 4-2-1, or like design, but think the tubes should be bigger/posters had some copied/pasted sizes below. Tolmach ^ Mine measure 31 mm = 1.22 inches Golddeenoh Tolmach, your pipes look kind of small as well but then again my Megan Racing header is 3mm larger diameter but i wouldn't think that i could tell the size difference in a picture with out side by side comparison. Tooter The inside diameter of stock 2012 header runners is 28mm and the Weapon R's are 36mm... Xnamerxx I measured 35mm for the port and 40mm for the gasket. So, for the ceramic coating is nice, but T409 is not as super duty as T304, at least what someone typed online here: http://www.autoanything.com/exhausts...s/t304-vs-t409 I was leaning towards OBX as their claim is 1 3/4 primaries which is 44 mm. It looks like the stock, so it won't have the lower end lacking, as not as much high end as the DC. Looking at sellers sites, it is hard to see all the sizes, they don't have em, really. I think 1 3/4 is a big boast, hopefully Amazon is right. For now, I will await other replies, but based on research so far, am leaning to the OBX for the steel type too, the T304 besides the bigger tubes and similar construction to a 4-2-1 set up or stock set up.... Thoughts and sizes anyone ? __________________ 2010 Yaris sedan, TRD CAT back (sport muffler only, really), OBX header (relocated front AF sensor to front pipe), OBX throttle plate spacer, K&N filter (in stock air box-for now), TRD struts and shocks, Mexico Rough Road Springs x 4, new Yota sway bar links front, slotted/drilled rotors and Maxx brakes front, Valvoline synthetic brake fluid, 3M undercoated, 16" Konig Feathers Michelin Pilot Sport AS 3 + Tires TRD rear sway bar, 4 GT Spec bars including: front strut brace 2 point, 4 point ladder brace, mid chassis brace and rear lower tie brace, rear hitch, [B]

07-04-2017, 06:40 AM	#202
JimKellyfan Drives: 2010 Yaris Sedan Join Date: Oct 2013 Location: the good Carolina Posts: 173	Ordered OBX header and TC TB spacer off Amazon. Buying two items off Amazon from OBX netted me 33 bucks off and was 12% their math. Was 199.99 and 74.99 before discount. __________________ 2010 Yaris sedan, TRD CAT back (sport muffler only, really), OBX header (relocated front AF sensor to front pipe), OBX throttle plate spacer, K&N filter (in stock air box-for now), TRD struts and shocks, Mexico Rough Road Springs x 4, new Yota sway bar links front, slotted/drilled rotors and Maxx brakes front, Valvoline synthetic brake fluid, 3M undercoated, 16" Konig Feathers Michelin Pilot Sport AS 3 + Tires TRD rear sway bar, 4 GT Spec bars including: front strut brace 2 point, 4 point ladder brace, mid chassis brace and rear lower tie brace, rear hitch, [B]

04-24-2017, 12:21 AM	#199
SirDigby View User's Garage Drives: 2007 yaris 3 door Join Date: Sep 2015 Location: Denver, Colorado Posts: 1,000	i'd say, "you get what you pay for" in most cases. cheap manifolds usually don't line up just perfect or have the best geometry or welds. i had an obx on my civic for over 200,000 miles without any issue. ($50) but, i'm also a cheap-ass and look for a better deal, and the complete exhaust was custom, so it did not matter if it lined up when purchased. i would not pay $500-$1000 for a TRD seeing how the gain is so minimal. i do disagree with the 4-2-1 vs 4-1 for performance stated above. 4-1 manifold gives a better top end torque because of where the collector location is in reference to pressure point of cylinder pressure drop during high rpm. (high rpm=high pressure scavenging further in the tube) 4-2-1 allows high pressure scavenging to occur at lower rpm, between sister cylinders; wile high rpm scavenging still occurs, but at lower pressure, so it has a less dramatic effect on high end performance. since i do a lot of city driving, the most noticeable gains should live in the 500-3500 range. (4-2-1) i do not believe there is a "better" design, i think it all depends on where in the RPM range you want the gains to be most noticeable. in the civic, i was driving from denver to phoenix every weekend. (1500 miles r/t) the obx was a 4-1 because it was always on the highway running as fast as possible. it all depends on your utility.