Upgrading your MR2 exhaust system is definitely one associated with the most pleasing actions you can take to your own mid-engine Toyota, whether you're rocking the classic AW11 or a later-model Spyder. There's just something about that engine sitting directly behind your head that makes requirements encounter so much more intimate than the standard front-engine vehicle. If the exhaust sounds like a lawnmower, you're heading to hear this. If it seems like a screaming competition car, you're going to feel it within your soul.
But let's be truthful: picking an exhaust isn't just regarding making noise. It's about finding that will sweet spot among performance gains, fat reduction, and not annoying your neighbours so much that these people call the police every time a person leave for work in the morning.
Why Bother Replacing the Stock Set up?
If you're still running the particular factory pipes, you're lugging around a lot of extra weight. Toyota built these cars to be reliable and quiet for the particular general public, which means the stock mufflers are often enormous, heavy, and incredibly restrictive. Most manufacturing plant MR2 exhaust systems use heavy-duty moderate steel and heavy baffles to help keep items hushed. When you change that out for a high-quality aftermarket setup, you're usually waxing off 10, twenty, or even thirty pounds right away the back of the car. Within a vehicle where balance is definitely everything, taking pounds off the tail actually changes just how it rotates within corners.
After that there's the energy. For your turbo owners specifically, the exhaust may be the biggest bottleneck. A turbocharger demands to breathe. The particular faster the exhaust gases can quit the turbine, the particular faster that turbocharged can spool up. By opening up the particular diameter of the pipes, you're reducing backpressure and letting the particular engine do its job more proficiently. Also on the naturally aspirated models, a well-designed header and cat-back system may wake up the particular throttle response and give you that will extra bit of "oomph" in the mid-range.
Choosing Your own Sound: Raspy compared to. Deep
Audio is subjective, yet it's probably the particular biggest factor intended for most of us. Many people love the particular high-pitched, raspy shout of a 4A-GE at 7, five hundred RPM. Others need that deep, bassy rumble that makes the 3S-GTE audio like a mini-supercar.
Whenever you're looking at various systems, take notice of the resonator and muffler design. A straight-through muffler is going in order to be loud—really noisy. If you're constructing a dedicated track car, go for it. When you're planning on taking any road outings, you might want something with a bit more "refined" audio.
The particular dreaded "drone" is the enemy here. Jingle happens when the exhaust frequency fits the natural vibration of the car's cabin, usually around 3, 000 to four, 000 RPM. Considering that that's exactly exactly where you'll be sitting down while cruising on the highway, the drony exhaust can turn a fun drive into a huge headache. Look regarding systems that mention "anti-drone" technology or even use high-quality packing material in the mufflers to saturate up those unpleasant frequencies.
Generation-Specific Considerations
The MR2 evolved quite a lot over its three generations, and every one needs a different approach when it comes to the exhaust.
The particular AW11 (First Gen)
For your 80s classic, you're usually dealing with the 1. 6L 4A-GE. This engine likes to rev. A two. 25-inch diameter system is usually plenty for any naturally aspirated build. If you go too big, such as a 3-inch tube, you might really lose some low-end torque because the exhaust velocity drops too much. You would like to keep those fumes moving fast.
The SW20 (Second Gen)
This is where things get fascinating. If you possess the Turbo model, a 3-inch MR2 exhaust system is actually the gold standard. It allows the particular 3S-GTE to inhale and exhale and significantly decreases turbo lag. In the event that you're running the particular non-turbo 5S-FE, you'll want to stick to something slightly smaller to maintain the particular backpressure under control. One thing to watch out for upon SW20s is the particular fitment around the rear crossmember—it's tight back there, therefore make sure you're buying a package specifically made for the particular chassis.
The particular ZZW30 (MR2 Spyder)
The Spyder ski jacket is a little bit of a different animal. Main things owners do is address the "pre-cat" problem in the stock a lot more. Those activities have a nasty habit of breaking down and having sucked back straight into the engine, which usually is a loss of life sentence for the 1ZZ-FE. Most individuals swap out your stock manifold for the high-flow header as their initial "exhaust" mod. From there, a light cat-back system may make the car audio much sportier with no adding unnecessary fat to the lightweight platform.
Components: Stainless Steel compared to. Titanium
Nearly all decent setups you'll find are made from T304 stainless-steel. It's the "just right" material. It's resistant to rust, looks great whenever it's polished, plus is far more durable than the cheap aluminized steel a person find at budget muffler shops.
If you've got money to burn and you're obsessed with excess weight, titanium is the strategy to use. A titanium MR2 exhaust system is incredibly light—you can literally choose up the whole muffler section with two fingers. This also provides a very unique, metallic "ping" towards the sound that a person just don't get with steel. The downside? It's costly, and if it ever cracks, it's much harder to find somebody who can weld it correctly.
Installation and the "Rust Belt" Struggle
In the event that you're planning upon installing your brand-new MR2 exhaust system yourself, I possess 1 piece of advice: buy a giant can of just one oil (like PB Blaster or WD-40 Specialist) and begin soaking those bolts three days just before you even touch a wrench.
MR2s are getting old. Those exhaust bolts have been heat-cycled thousands of times and also have probably seen plenty of rain, salt, and dirt. They love to breeze. If you're fortunate, the bolts can just be stubborn. If you're unlucky, you'll be going out studs in the middle of your Sunday mid-day. It's also a good option to buy brand-new exhaust hangers. The particular old rubber types get brittle and saggy as time passes, and there's nothing even worse than a shiny new exhaust that will sits crooked because of a $5 piece associated with rubber.
Don't Forget the Catalytic Converter
Depending upon where you live, you might have to offer with emissions assessment. If you're within the "off-road only" path, a test pipe (a straight tube that replaces the cat) will give you the most flow and the particular loudest sound. But for those of us who need in order to keep things street-legal, a high-flow catalytic converter is a great middle surface. You get better flow than the restrictive factory kitty with no smell associated with unburnt fuel adhering to you everywhere you go. Plus, it will help take a little bit of the "rasp" out of the exhaust note, which can can even make the car sound more expensive.
Final Ideas
At the end of the day, the greatest MR2 exhaust system is the one that makes a person want to drive the car more. When you are taking the long way home just so you can hear the engine sing via a tunnel, you've made the right choice. Don't just go for the cheapest option upon eBay—do some study, listen to sound videos online (even although they never do the real factor justice), and believe about how a person actually use the particular car.
Whether you're searching for a track-ready screamer or a smooth-sounding daily car owner, there's something out there there for every single MR2. Just end up being prepared for the reality that once a person start modding the exhaust, you're probably going to want in order to do the consumption, then the intercooler, then well, you know how this goes. That's just the life of an MR2 owner.