HKS Hi-Power Cat-Back Exhaust with Titanium Tip for Mazda RX8 (Series 1 & 2, 2003-2012)

Bolt-on 75mm SUS304 cat-back system with a burnt titanium outlet, freeing rear exhaust flow and giving the Renesis a fuller, crisper rotary note.

Reviews from around the web

Independent reviews of this product gathered from other stores and owner communities.

I have it installed with the resonated bhr midpipe. I used to also have it installed with just a gutted oem pipe. It sounds real nice. If you keep rpm's under 4k, it's not too loud with a lower rumble, but above that and it'll start ripping.

I agree with this. I have an HKS cat back w racing beat mid pipe and it sounds exactly like this. A quiet yet decent pitch rumble and it sounds great. Not over the top and not too quiet

Same setup. Cold starts don't wake up the neighborhood, albeit you're by no means a Prius. But anything above 4.5k it definitely starts to scream.

No drone. Windows up and music up, you won't even hear your own exhaust lol.

By far my favorite sounding exhaust setup on these cars, loudness aside, the tone is just crisp, clear, and not muddy or raspy. Want to see what headers would do to this setup but I fear that it would get loud enough to get pulled over a lot :/

I have the HKS Hi power, absolutely love it. It's much lighter than stock. Got a nice low tone at idle, reasonably quiet at 3.5k rpm around town and doesn't drone much on the highway.

It's absolutely ignorant when you get to the redline with a satisfying "Pop POP" between gear changes. Has a unique sort of burble when the RPM's are coming back down..

You will love it too:)

I have the hks on a mark 1 like yours

No drone lovely deep tone, not harsh at all at low revs,

But when you give it some Welly it roars lovely Definitely recommend

I'm running the Hi-Power single exit with a full straight pipe. It's loud, but it sounds so good over 5k RPM

I am pretty sure anyone looking at this knows exactly what you are getting in to. If ...

HKS always delivers a quality product, this is no exception.

I'm running it with the stock cat, and it's relatively loud, but not obnoxious. I haven't heard it compared to the borla though. My wife can hear me from about a quarter mile a way if she's outside and I get on it. At idle and just cruising, it's fairly tame. I haven't had any trouble with it or any unwanted attention. It is not raspy at all and doesn't bellow as much as say a Greddy SP2. It's actually only a tad louder than an SP2, so if you've heard one, you can get an idea for sound.

im running the hks hi-power with the RB dr midpipe. i absolutely love the sound, planning to get the RB header sometime too.

I had the hks hi power with ap midpipe and it was loud as hell but i loved it until i started getting pulled over all the time for it. You just have to keep the rpms down around the cops.

Im buying the HKS next month. Everyone is trying to talk me out of it because of the single sided but I love this exhaust, always been my favorite since the day I first heard it.

I love my setup. Haha had cops give me the thumbs up at a red light. Lol

I used to have the HKS Hi-power with the BHR midpipe when I was NA, and I loved it. It's not quiet but it is no where near as loud as my buddies NA RX-8 with the TurboXS header, midpipe, and catback was. His car was f%^cking loud.

my youtube videos are all running the HKS hi-power with racing beat dual res midpipe. sounds glorious @ WOT, but also tame enough to cruise 8 hours on the highway.

I say hks hi power (im a happy owner of it)

my vote is the hks, love the tone it brings and i happen to have one..lol

$1,900 inc GST

The RX8 titanium tip exhaust from HKS is a complete cat-back replacement engineered for the Renesis rotary. It swaps the restrictive OEM rear section for 75mm SUS304 stainless piping and a straight-through muffler. The result is freer breathing from the midrange right up to the redline. That rewards the rotary’s appetite for revs with a sharper, fuller exhaust character.

RX8 Titanium Tip Exhaust Key Features

  • 75mm SUS304 stainless piping replaces the narrower OEM rear section, supporting freer exhaust flow across the rev range.
  • The 97mm outlet carries a burnt titanium tip, lending the car a distinct Japanese performance signature at the rear bumper.
  • Straight-through muffler internals reduce back-pressure. The note stays composed at cruise, with minimal drone for daily driving.
  • An offset muffler layout maintains a clean under-car profile, sitting within the OEM envelope without clearance concerns.
  • Finally, supplied clamps and mounting hardware mean this titanium tip exhaust system is ready to bolt on without sourcing additional fitment parts.

For rotary enthusiasts, the real reward shows up on the open road. Expect a crisper throttle response and a more vocal Renesis note as revs climb.

The blue-burnt outlet against stainless bodywork is a considered finishing detail. It sets this apart from a generic aftermarket tip. This RX8 cat-back suits daily drivers wanting a more engaging drive and weekend builds chasing a cohesive performance look.

Running an RX8 titanium tip exhaust in Australia pairs naturally with the HKS Metal Catalyzer, keeping the upstream catalyst section matched to the same engineering pedigree. For a purposeful exterior accent echoing the exhaust’s Japanese performance theme, the ODULA Fresh Air Grille (Carbon Fibre) adds a complementary visual detail at the front end. Learn more about HKS engineering on the official HKS website.

Reviews from around the web

Independent reviews of this product gathered from other stores and owner communities.

I have it installed with the resonated bhr midpipe. I used to also have it installed with just a gutted oem pipe. It sounds real nice. If you keep rpm's under 4k, it's not too loud with a lower rumble, but above that and it'll start ripping.

I agree with this. I have an HKS cat back w racing beat mid pipe and it sounds exactly like this. A quiet yet decent pitch rumble and it sounds great. Not over the top and not too quiet

Same setup. Cold starts don't wake up the neighborhood, albeit you're by no means a Prius. But anything above 4.5k it definitely starts to scream.

No drone. Windows up and music up, you won't even hear your own exhaust lol.

By far my favorite sounding exhaust setup on these cars, loudness aside, the tone is just crisp, clear, and not muddy or raspy. Want to see what headers would do to this setup but I fear that it would get loud enough to get pulled over a lot :/

I have the HKS Hi power, absolutely love it. It's much lighter than stock. Got a nice low tone at idle, reasonably quiet at 3.5k rpm around town and doesn't drone much on the highway.

It's absolutely ignorant when you get to the redline with a satisfying "Pop POP" between gear changes. Has a unique sort of burble when the RPM's are coming back down..

You will love it too:)

I have the hks on a mark 1 like yours

No drone lovely deep tone, not harsh at all at low revs,

But when you give it some Welly it roars lovely Definitely recommend

I'm running the Hi-Power single exit with a full straight pipe. It's loud, but it sounds so good over 5k RPM

I am pretty sure anyone looking at this knows exactly what you are getting in to. If ...

HKS always delivers a quality product, this is no exception.

I'm running it with the stock cat, and it's relatively loud, but not obnoxious. I haven't heard it compared to the borla though. My wife can hear me from about a quarter mile a way if she's outside and I get on it. At idle and just cruising, it's fairly tame. I haven't had any trouble with it or any unwanted attention. It is not raspy at all and doesn't bellow as much as say a Greddy SP2. It's actually only a tad louder than an SP2, so if you've heard one, you can get an idea for sound.

im running the hks hi-power with the RB dr midpipe. i absolutely love the sound, planning to get the RB header sometime too.

I had the hks hi power with ap midpipe and it was loud as hell but i loved it until i started getting pulled over all the time for it. You just have to keep the rpms down around the cops.

Im buying the HKS next month. Everyone is trying to talk me out of it because of the single sided but I love this exhaust, always been my favorite since the day I first heard it.

I love my setup. Haha had cops give me the thumbs up at a red light. Lol

I used to have the HKS Hi-power with the BHR midpipe when I was NA, and I loved it. It's not quiet but it is no where near as loud as my buddies NA RX-8 with the TurboXS header, midpipe, and catback was. His car was f%^cking loud.

my youtube videos are all running the HKS hi-power with racing beat dual res midpipe. sounds glorious @ WOT, but also tame enough to cruise 8 hours on the highway.

I say hks hi power (im a happy owner of it)

my vote is the hks, love the tone it brings and i happen to have one..lol

Additional information

RX8 Model

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Colour

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SKU HK-EXH-S1S2 Category Types , , Brand:

Related RX8 Upgrades

This cat-back exhaust system is one of the best Mazda RX-8 upgrades you can make to your Series 1 (2003-2008) or Series 2 (2009-2012). Performance exhaust systems are among the top Aftermarket mods you can buy from HKS for owners who want better performance and reliability from their RX8. If you are looking for rx8 hks cat-back exhaust for sale in Brisbane (QLD), Sydney (NSW), Melbourne (VIC), Canberra (ACT), Adelaide (SA), Darwin (NT) or Perth (WA), you’ll find high-quality Japanese Exhaust upgrades at RX8 Upgrades.

Frequently Asked Questions

Does the HKS Hi-Power cat-back exhaust fit both Series 1 and Series 2 RX8 models?

Yes, the HKS Hi-Power cat-back exhaust is confirmed to fit both Series 1 RX8 models (2003-2008) and Series 2 RX8 models (2009-2012), so there is no need to source different part numbers for each generation.

What pipe diameter does the HKS Hi-Power RX8 exhaust use?

The system uses 75mm SUS304 stainless steel piping through the cat-back section, with a 97mm burnt titanium outlet tip at the rear.

What does the burnt titanium tip actually look like?

The 97mm titanium outlet develops a characteristic blue-to-gold heat colouration, giving the rear of the car a distinct Japanese performance aesthetic that contrasts with the polished stainless piping.

Is this a straight-through design or does it retain a muffler?

The HKS Hi-Power system uses an offset muffler with straight-through internals, reducing restriction through the rear exhaust section while keeping a tidy under-car arrangement and avoiding the excessive drone of a fully unmuffled setup.

How does the HKS Hi-Power change the sound of an RX8?

The system produces a deeper idle note and a crisper sound through the rev range, which suits the rotary engine's high-revving character. HKS have tuned the internals to deliver this without significant cabin drone at cruising speeds.

Is installation straightforward, and does it come with all the hardware needed?

The HKS Hi-Power is a bolt-on cat-back system and is supplied with clamps and mounting hardware, so no additional fasteners should be required for a standard fitment.

Which part of the exhaust system does this replace?

This is a cat-back system, meaning it replaces the exhaust from behind the catalytic converter to the rear tip. The front pipe and catalytic converter are retained, keeping emissions equipment in place.

Are there any companion parts worth fitting at the same time?

Fitting the APEXi Strengthened Exhaust Hanger Set is a sensible addition when installing a new exhaust, as upgraded hangers properly support the system's weight and reduce stress on mounting points. An intake refresh with a performance panel filter is also a popular pairing to complement the freer exhaust flow.