PRODUCT DETAILS
PRL Motorsports High Volume Intake - FK8 Civic Type R (PRL-HCR-INT-HVI)
You came here looking for the PRL HVI, so let's get you sorted. Here's what shows up at your door: a 6" cone filter, an HDPE rotomolded airbox that hooks into your factory air duct and seal so you're not sucking in hot engine bay air, and a two-piece MAF housing with velocity stacks. Custom molded 4-ply silicone joins it all up without choking anything down. The only thing you've got to decide is which MAF housing you want, and that's where most people get tripped up, so let's walk through it.
Standard Bore Or Big Bore? Here's How To Choose
This isn't a "which one's better" question. It's a "where's your build at" question, and the answer's usually pretty obvious once you look at it that way.
Go Standard Bore if your car's stock or lightly modified. The reason it's the easy pick is that it doesn't need an ECU calibration, so you bolt it up and go drive. PRL puts it at 11 to 12 horsepower at the peak and around 32 through the midrange over factory. That midrange figure's the one that matters, by the way. It's what you'll actually notice pulling out of a corner, not a number you'll only ever see on a graph.
Go Big Bore if you're building something serious. It's rated past 600 horsepower and moves 47% more air than either the factory housing or the Standard Bore. But it needs a specific ECU calibration and MAF scaling, and that isn't optional, especially once you're chasing more than 450 horsepower. PRL did the work on their end, profiling the volute and placing the MAF sensor flange so your fuel trims stay stable, but your tuner still has to scale it properly on the car.
Why You Can't Just Bolt On The Big One
Worth understanding before you order, because it saves a lot of grief. Your MAF sensor reads how much air is coming in, and the ECU leans on that number to figure out fueling. Open the housing up and the air moves across that sensor differently, so the ECU's reading changes. It's not that a bigger housing is somehow wrong, it's that nobody's told the computer about it yet. That's the whole reason the Standard Bore drives fine untouched and the Big Bore doesn't. If tuning isn't in your plans right now, you already know which one to click.
One Piece Of Advice Before You Add To Cart
We'd rather tell you this up front than hear about it later. Don't buy the Big Bore hoping you'll sort out the tune eventually. Have your tuner lined up first, or grab the Standard Bore now and step up when the rest of your build catches up. There's no shame in the smaller housing. Plenty of quick cars are running it, and a properly scaled Standard Bore will drive better than a Big Bore that's waiting on a calibration.
What It Fits
It fits every 2017 through 2021 Civic Type R FK8. Pick your MAF housing at checkout and you're set.
Fits: 2017-2021 Honda Civic Type R (FK8). Part numbers: PRL-HCR-INT-HVI-A and PRL-HCR-INT-HVI-B. Filter: 6" cone. Airbox: HDPE rotomolded, factory air duct and seal. MAF housing: two-piece with velocity stacks, Standard Bore or Big Bore. Standard Bore: no ECU calibration required, 11-12 hp peak and roughly 32 hp midrange over stock, per PRL. Big Bore: rated over 600 hp, 47% more airflow, requires ECU calibration and MAF scaling. Silicone: custom molded 4-ply.