The Official Turbo Manifold Thread

[Inquisitive]

Exhaust Manifold, Port & Polish and Intake Manifold

With threads like this it is often asked, “Which is the best?” This is difficult to answer as some consider best quality at any price, personal preference / bragging rights / street cred (popular brand), best value (quality at a good price), popularity (local Nator), cheapest price, etc. This is just a list in descending Genpu purchased popularity order. You may be able to find better deals from various websites. It is up to you to find the best price.

See MSF Wiki Glossary for any terms not understood: Glossary - Mazdaspeed Forums Mazdaspeed 3/6 Wikispeedia]MSF Wiki

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Upgraded exhaust manifold (EM)

The stock manifold should be just fine until you go big turbo (Calvin@Cobb) as usually this manifold does not align with the BT for installation. Basically, any improvement in air flow into or out of the engine results in more performance. Improving the exhaust flow has the added benefit of more VE, which translates into better fuel consumption, less backpressure for transitioning from deceleration to acceleration and faster turbo spooling.

CP-E LTRmani

Cast 304 SS, durable, good to 700 HP, zero chance of cracking (weld-less), integrated external wastegate (can be used immediately or at a later date) (~44mm opening), optional Block Off Plate and clamp, cast merge collector spike. equal length runners, Tial waste-gate flange options
Available from: CP-E LTRmani
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $943.95

DNP SS: SS-321

Designed to maximize the exhaust flow increasing the quickness of the turbo spool up into boost, requires no porting, one-year crack free warranty, DNP DISCONTINUED as company is no longer in business
Available from: No longer available
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $581 when was available

Full Race Pro

robotic-TIG welded SS, equal length runners, direct bolt-on upgrade replacement designed to work with any stock or stock-frame upgrade turbocharger up to 500whp, i.e.: ATP Garrett GT28R, 30R, etc.
Available from: Full Race Pro
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $886.88 + $120 black or silver manifold coating

Full Race EFR

robotic-TIG welded SS, equal length runners, direct bolt-on upgrade replacement designed to work with any B1 frame EFR turbo such as EFR6258 and EFR6758
Available from: Full Race EFR
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $1,075.65 + $120 black or silver manifold coating

Steedspeed

Note: stock flange flows less than Mazda EM
CAD designed to direct the exhaust at the turbo using the most direct tubular route possible retaining the kinetic energy in each exhaust pulse, machined on a Makino out of 1018 steel, finished with a thick ceramic coating that can stand up to 2,000 degrees, bolt-on stock replacement. Although all passages are fairly equal in length, for turbo applications, equal length is not important for making power. DISCONTINUED
Available from: No longer available
MS6 (), MS3 Gen1 (), MS3 Gen2 () $750 when was available

AFI Turbo Manifold

Stock Mazda turbo flange, T3 frame, or V-band with EWG option in either 38mvs or 44mvr
Available from: AFI Turbo Manifold
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $849 or Race $1,139

OBX Racing Sports Turbo Manifold (eBay)

Note: no guarantee to fit 99% of turbos
T-321 SS (v T-304, which is prone to cracking), lifetime warranty from manufacturing defects and cracking
Available from: OBX Racing Sports Turbo Manifold
MS6 (Not found), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $287.50

JDM (eBay from Hong Kong)

15 HP gain, T-304 SS, mandrel bends for K04 and BNR, improves outflow by 30%, more balanced flow from all runners, TIG Welded CNC Machine Flange, faster turbo spool. The factory turbo bracket may need to be removed for fitment.
Available from: JDM
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $249

XS Power V2 / V3

*** WARNING *** known to crack / leak due to thin metal, bad welds, fitment problems, dimpling primaries (aaronC5Z), 15 HP gain, 28% better and more balanced flow
Available from: XS Power V2
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $475

Treadstone

Highest grade ductile iron, coated with a high temperature paint to prevent rusting, iifetime warranty
Available from: Treadstone
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $339.15

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Port and polishing (PNP)

Un-tick Codes P2006 and P2009 when doing a VTCS delete.

The purpose of porting, polishing and usually also ceramic / powder coating, is to increase the intake flow capacity.

PNP intake manifold with VTCS Delete:

usually done locally
Available from: check with your local speed shops
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $?

NJSpeed
Available from: @NJSpeed;
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $?

snailD
Available from: @snailD;
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $?

SpeedPerf6manc3
Available from: SpeedPerf6manc3
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $90 / hour

Relentless Customs
Available from: Relentless Customs
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $359.95

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Upgraded Intake Manifold (IM)

In addition to PNP’s increasing the intake flow capacity, IM also improves the balance between the runner lengths. The OEM intake manifold (MAPerformance) has a variance of 25.23% between the runners.

Manifold Runner 1 Runner 2 Runner 3 Runner 4 % of Imbalance Total CFM
Stock 218 258 273 227 25.23% 976

JM Fab (JMF)

Sheet-metal Intake Manifold: 8 HP, 11 ft-lbs on K04, TIG welded from high quality 6061 T6 aluminium, CNC machined flanges and radiused inlets into each plenum bottom to improve airflow by 10-15%. Included with each manifold is all new stainless steel hardware, brass vacuum fittings, fittings to relocate your fuel pressure sensor, vacuum hose and a check valve for the EVAP line preventing you from having to destroy the OEM line. Options available are a "BRUSHED / UNPOLISHED" finish or a mirror like "POLISHED" finish. The TB elbow and inlet do not get polished. They are not visible once installed. There are additional throttle body flanges, a mount for the OEM MAP sensor, NOS bungs which are pre-drilled with a centring hole, but not tapped or drilled through the runners. That is left to the customer due to the many different nozzles on the market. Also, 1/8" NPT bungs are available for WMI, which are drilled through the runners completely. The throttle body can be installed rotated 180° from OEM for more clearance from the wire harness on the starter. Note: will NOT work with the stock top mount intercooler. Requires two to three weeks to make
Available from: JM Fab (JMF)
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $1,036.67 options: throttle body flange (stock or 75mm bore), OEM MAP mount, polished

Ultimate Racing
Available from:
MS6 (Not found), MS3 Gen1 (), MS3 Gen2 ()

Beachshoer with VTCS delete
Available from:
MS6 (), MS3 Gen1 (), MS3 Gen2 ()

James Barone Racing
Available from:
MS6 (), MS3 Gen1 (), MS3 Gen2 ()

MAPerformance (Modern Automotive Performance) Rev3 Intake Manifold

26 HP gain, will take your core in exchange. This is included here as the stock plenum is cut open and reshaped to achieve a decreased 5.8% variance between the runners while improving the flow capacity by 7.31% to 1073 CFM.
Available from: MAPerformance (Modern Automotive Performance) Rev3 Intake Manifold
MS6 (Yes), MS3 Gen1 (Yes), MS3 Gen2 (Yes) $649.99 + options: ceramic coating $150 (black or blue), $400 (core)

Street Unit High Flow Intake Manifold with PNP option
WARNING: read http://www.mazdaspeedforum.org/forum/foru...3/#post1927730
Available from: SU
MS6 (?says all MS), MS3 Gen1 (?says all MS), MS3 Gen2 (?says all MS) $395


I have included the discontinued items (DNP, Steedspeed) as you still find them in signatures and they may be “for sale” when un-installed for selling the vehicle. Also, note the Warnings.

For now, the table in the IM Section is not working.

I could not find links to UR, Beachshoer and JBR’s IMs, although several MSF members state they have installed these. Please provide these to me if you can.

Let me know if I have missed anything.