Aftermarket Modification Guide 

This is an attempt to bring information about the available aftermarket parts for the Mazdaspeed Protege together in one place. Items specific to our model of car (cold air intake, turbo-back exhaust, etc.) will have links to their respective web page. Generic items (boost controllers, turbo timers, etc.) may or may not; please do your own research when purchasing these products, as they are available from many different retailers. This list will be updated as new parts become available. If you know of an item that is not listed, send me a PM with the info. I'll add the part and give you credit for the find. Vendors will not be listed in the "Other Contributors" section.

DISCLAIMER: All information presented here is expressed with absolutely no guarantees on price, performance, or safety. Use this information at your own risk to help you in your research for MSP modifications. I do not accept any responsibility for your actions or the results of such actions.

Visit and for information about warranty issues. Basically, your warranty cannot be voided simply for having aftermarket parts. It has to be proven that the specific part caused the damages.

Turbo timers are designed to keep the engine idling after the engine is shut down and ignition key is removed. The purpose is to keep oil running through the turbo to cool down the center housing. This is particularly critical after a hard run, where the turbines can spin at over 200, 000 RPM and reach temperatures as high as 900C. If an engine is shut down immediately after a hard run, the turbines may still be spinning without any circulating oil. Extended and repetitive oil coking within the oil lines and center housing could result in clogging problems and damaged turbos. Factory turbos, as well as aftermarket turbos, are susceptible to damage from these problems.

The Mazdaspeed manual recommends you idle for 30 seconds. A Turbo Timer will keep your engine running for the proper time after you remove the key from the ignition. There is a theft protection feature built in to most turbo timers, so you don't have to worry about getting your ride stolen. There are currently no harnesses available for turbo timers, however, installation can be as simple as three splices into the ignition harness. That will depend on features of the individual units, though.

A'PEXi Auto Timer
The A'PEX Auto Timer features a compact interface design (4 x 3/4 x 5/8 inches) with a separate control unit that can be hidden away underneath the dash. This display is a unique "pen-shape", which allows it to be mounted pretty much anywhere you want.

This is also the first timer with an integrated air-fuel ratio monitor. The unit reads the O2 sensor signal from the ECU and extrapolates an air-fuel ratio value. Since the timer uses the factory 02 sensors, which is primarily designed for emissions, the readings may not be as accurate as racing air fuel ratio monitors, but readings are very close. This timer can detect the engine load before shutdown and adjusts the idle time accordingly. Finally, the timer has a safety/security feature that immediately shut down the engine when the parking brake is released.
Buy Apex'i Turbo Timer

Blitz Dual Turbo Timer DC II
This unit combines a turbo timer and boost gauge in one unit. This timer has a boost sensor which senses how long you've been in boost and adjusts the timer accordingly. Run it hard and it'll increase the time; run it easy and the time will go down. It also features a digital boost gauge that reads in bar, not psi. The unit has a peak-hold gauge so you can display the highest recent boost level which is readable on a LCD backlit display for day and night visibility. Available in silver and black to allow you to match your interior scheme as you store it in any DIN-sized slot available. Backlighting is green with red for the alarms and countdown mode.
Buy Blitz Dual Turbo Timer DC II

Blitz FATT DC III Turbo Timer
The FATT DC turbo timer uses a new form factor that separates the display from the rest of the timer. The dislay measures a mere 3.4" wide, 1" high, and only 5/8" thick, so you can surface-mount it almost anywhere you see fit for the black or silver case. The green backlit LCD display is easy to read, day or night. A separate electronics module (3" square, 3/4" thick) can be mounted out of sight.

Feature wise, this timer has quite a few. First of all, the timer uses electrical system voltage to calculate how long it should idle the car at shut-down, based on how high the rpms have been, as most timers do. If you prefer, it can base the shut-down time on how long the motor has been on; if you go on a long trip, shut-down time will be longer. If you go for a very short, easy drive, shut-down time will be very short. It functions as a digital voltmeter for your car's electrical system and it can display the temperature (degrees C) inside your car. A lap timer stopwatch lets you keep track of up to five laps.
Buy Blitz FATT DC III Turbo Timer

Greddy Full Auto Turbo Timer
GReddy Full Auto Timers have two standard programmable count down presets (P-1, P-2) and also have two auto timer modes (A-L, A-H). The modes estimate the driving RPM according to the vehicles alternator signal and then recommend a count down time. Unit also has stopwatch/lap time and attack modes along with a built in voltmeter and speedometer. Still standard are the optional parking brake and speedo safety hook-ups. Available in silver and black with blue display that flashes red during countdown/alerts.
Buy Greddy Full Auto Turbo Timer

HKS Turbo Timer Type-0
The HKS Turbo Timer Type-0 is a basic turbo timer that features an auto mode that adjusts engine idle time according to the most recent driving pattern, multiple preset times, audible alarms and a volt meter. The easy to read back-lit digital LCD display flashes between orange and red during the countdown The Type-0 is ultra compact, less then a 1/4 din in size and available in a black or silver case.
Buy HKS Turbo Timer Type-0

HKS Turbo Timer Type-1
The HKS Turbo Timer Type-1 offers all the features of the Type-0, PLUS several monitoring and measurement tools. Vehicle speed and RPM can be displayed on the Type-1's LCD monitor and a speed warning level can be set. A 2 stage RPM warning can also be set and used as a shift light. When a warning level is reached the Type-1's LCD monitor will switch from blue to red and an audible beep will sound.

The HKS Turbo Timer Type-1 also features various measurement tools including 1/4 mile timer, 0-60 timer and a stopwatch function that can be used for lap timing (see chart on next page for more functions). All of these features are fit in the same ultra compact case as the Type-0 and is also available in black (MPH/SAE) and silver (KPH/Metric).
Buy HKS Turbo Timer Type-1

There are a few other turbo timers out there but those are the most commonly used due to the name brands. Try searching google for turbo timers and you may run across another brand not listed that you like better.


You need a boost gauge before you get a boost controller!

The Autometer ProComp Ultra-Lite series matches the stock gauges pretty well (day and night), and are very reasonably priced. MSP owners have also been seen with Defi and GReddy gauges, which are more expensive, but more accurate, than the Autometers.

Even though the gauge pods listed below are for 52mm gauges, people have had success using a Dremel or similar tool to cut out a hole for 60mm gauges. Paint for the pillar pods (very close match to stock) is available at:

Full A-Pillar Pod (two 2"/52mm gauge openings) : $58.00 shipped
Full A-Pillar Pod (three 2"/52mm gauge openings) : (Part # 105-22657), $58.99
Steering Wheel Pod (one 2"/52mm gauge opening) : , $80.00 shipped

The MSP runs at ~6.5 psi, but has been shown to vary greatly from car to car. A Boost Controller allows you to increase the boost level, thus increasing your performance. There are two main categories: MBC's (Manual boost controller) and EBC's (Electronic boost controller). MBC's are much cheaper, but require you to go under the hood to change your boost setting. Also, getting the boost where you want to takes some tuning (mainly running through 3rd gear, watching the boost gauge carefully). EBC's allow you to change the boost level more easily, and from inside your car. Some even have multiple settings, so you could have one setting for day-to-day driving, and another one with higher boost for the track.

What boost should you run? What has been accepted by most members of the board as 'safe' for daily driving? These are questions that you need to research yourself. Upping the boost too much, or without other mods (like colder spark plugs) will cause irreversable damage to your motor. To start out, try 9psi; this is for both flashed and unflashed ECU's. There is an airflow based fuel/spark cut (when the MAF gets maxed out), and members boosting over 9psi (or over 8psi in cold weather) are hitting it. A Fuel Cut Defenser gets around this limitation.

JoeP XZ MBC : This is the MBC that most members have. It's made by a guy named Joe Pampena (his member name here is kwiktsi), costs $45, and is easy to install/uninstall. An optional electronic controller gives you in-cabin control over boost. Available from .
Turbo XS MBC : Similar to the JoeP. $79
Turbo XS High Performance MBC : Claims to make your turbo spool quicker. $129
Turbo XS Dual Stage MBC : Allows in-cabin switching between two boost levels (normally only found on EBC's). $239
JoeP FCD (Fuel Cut Defenser) : Fully adjustable for your needs, if you're boosting over 9 psi you're going to need it, especially in the winter. $60.00 from .

EBC's are similar to the Turbo Timers, where each brand has different features that you need to research yourself. They all do the same thing. The Greddy Profec B seems to
be one of the most popular models, and it's pretty reasonably priced at around $330.

The MSP runs insanely rich. Take a look at a dyno chart with an air/fuel mixture graph, or even easier, look at the carbon deposits on your exhaust tip. This overly rich fuel mixture is the main cause of the 'hesitation' that MSP owners have complained about. The ECU flash advances the timing to overcome this, but the fuel mixture is still too rich.

JoeP FPR (Fuel Pressure Reducer) : Has eliminated or reduced the hesitation problem for many members. Mainly for unflashed MSP owners, but people have used it on flashed ECU's with no problems so far. $25.00


Stock MSP spark plugs are platinum NGK PZFR6F's. Colder, copper spark plugs would be a wise investment if you're upping the boost in your MSP. Detonation (Pre-ignition, where the air/fuel mix in the cylinder burns before being lit by the spark plug) WILL cause damage to the motor. Why copper? Platinum plugs have a sharp tip and don't conduct enough heat away to prevent detonation at boost levels higher than stock. A copper spark plug has a wider tip that conducts heat much better, and may prevent you from messing up your motor. The factory spark plug gap is 0.028" - 0.032".

Copper NGK BKR7E's (#6097) are cheap (around $2 each) and work well for our car. They are one heat range colder, and are bare copper plugs. You can have your local auto parts store (Pep Boys, Autozone, etc.) special order them for you, or get them from or


Urethane engine mounts : Greatly reduces wheel hop, and driveline thrash when shifting. Be warned that the car will vibrate a LOT with both front and rear mounts replaced. Some people have replaced the front mount only, and have found it's a good trade-off. $127.00


Kartboy Shifter Bushings : Reduces play in the shifter. $25.00
GM Syncromesh Manual Transmission Fluid : It's a much better fluid than what's in the MSP tranny. It'll make shifting easier, and less notchy. Available at your local GM dealer. Some people say the Pennzoil Syncromesh is the same stuff, and it's available at most auto parts stores.
ACT Clutch : A higher-performance clutch than what's stock, and it'll handle more power. Get the street disc, not the 4-puck or 6-puck, unless all you do is race your MSP. Available from with a special price of $312 plus $25 shipping for members of the forum.


An upgraded intake allows air to flow more freely to the intake manifold. More air is allowed into the engine, which in theory increases your power. It has been shown that the stock airbox in the MSP is surprisingly adequate, but small gains can be had by upgrading the intake. Plus, a nice intake looks much better than the stock airbox, and will earn you extra points at a show. You're car will be louder, and the gobble from the BPV will be more noticable when an intake is installed.

An upgraded FMIC (Front Mounted Intercooler) will greatly cool the air going into the engine. The turbo generates a lot of heat, and the air coming out of it is hot as well. The intercooler is placed after the turbocharger to cool this hot air down. The stock MSP intercooler is tiny and inefficient, and gets heatsoaked very easily. An upgraded intercooler will help an already modded MSP very much. Gains will also be made with a stock MSP, but an FMIC is a rather costly item and produces larger power gains with an already modified car.

Hardpipes replace the stock (plastic) intercooler pipes with metal.

Injen Cold Air Intake: (Part # RD-6066), $203.22 from
ION Cold Air Intake: Ph#: 403-615-7269, Email:
ION FMIC: Ph#: 403-615-7269, Email:
ION Hardpipes: Ph#: 403-615-7269, Email:
K&N Panel Air Filter: Replaces the stock air filter only with a more breathable filter. Does not replace the entire intake. (Part #599-33-2134)

The stock exhaust is 2.25", with 2 catalytic converters, and a nasty S-bend.

APEX Downpipe (no catalytic converter) : A 2.5" bolt-on downpipe that gets rid of both cats. Includes everything you need, dynoed at 10-12 additional WHP. $299
APEX Downpipe (1 high-flow cat) : A 2.5" bolt-on downpipe with a high-flow cat.
APEX Cat-Back exhaust :Either a 2.5" or 3" (add $50) cat-back system with an APEXi N1 muffler. $550. $50 off for first 10 purchases (group buy offer).
ION Performance : Offers a 3" Downpipe-back and Full Turbo-Back exhaust, as well as a cast equal-length turbo-exhaust manifold. Ph#: 403-615-7269 Email:
Magnaflow Cat-Back exhaust : $492.83
Protosport Downpipe: : A 60mm (2.4") bolt-on downpipe w/o cat.

(Written by Striker187)

Eibach Sportline : Approximate Drop - 1.8" F&R; Price: $205
Eibach Pro kit : Approximate Drop - 1.4" F, 1.8" R; Price: $205
H&R Lowering Springs : Approximate Drop - 1.3"; Price: $229
Tein S-Tech : Approximate Drop - 1.8" F, 1.5" R; Price: $165

Unknown if these are applicable to the MSP (they are to the regular Protege)
Auto Exe Sport Dampers : Set of 4 - Price: $685
Mazdaspeed Adjustable Struts : Price: $178 ea.
Tokico HP Struts :
Illumina Struts :

Tein SS : $1199 from
Ground Contro l: $369 from
JIC-Magic : for type BJFP ('99+) : MSRP - $1920 (I think these will work for the msp)
Skunk2 : for P5 ('02+) : MSRP - $514.06 (I think these will work for the msp)
Tokico : HPK Suspension Kit: contact corksport for pricing.
ILK Suspension Kit: contact corksport for pricing. (I think these will work for the msp)

Listed for regular proteges, I assume are applicable on the msp. All are available from
Auto Exe Lower Arm Bar : $116
Auto Exe Sway Bar Set : $518
Auto Exe Member Bar Set : $450
Corksport Front Strut Tower Bar : $79
DG Motorsports CF Front Strut Tower Brace : $300

Kit#1 (Front Strut Tower Bar) : MSRP - $169.99
Kit #2 (Front Lower Subframe Tie Bar and front lower subframe X-brace) : MSRP - $269.99
Kit #3 (Rear upper chassis stiffener) : MSRP - $399.99

Unknown website for protosport. see this thread for more information:

Wilwood front brake upgrade (with 4-piston calipers):


(All available from )
APC : Price unknown
DG Motorports : $698
DG Motorsport Ram Air Hood : $900
OEM Hood : $650

Add auxiliary inputs to the Kenwood KDC-MP919 head unit in the Mazdaspeed.

Single input: $19.99
Multiple inputs: $79.99

Autometer Ultra-Lite Boost Gauge (20 psi boost/30 in. Hg vacuum): $42.99 from Jegs
Autometer dual gauge pod (full A-pillar): $56.99 from Jegs
Set of 4 NGK BKR7E spark plugs: $8.00
JoeP MBC @ 9 psi: $45.00
Total Cost: Well under $200 with tax+shipping
Gains: 0-60 should be around 6.5 seconds (0.5 second improvement). High 14's are attainable in the 1/4 mile.