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Wagyu Sirloin SB 6-7

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$55.00

The Diamantina Wagyu Sirloin showcases fine dining quality beef, hand-selected from our SB 6-7 marble score range. Known for its balance of tenderness and bold beef flavour, this cut is ideal for creating perfectly portioned steaks or roasting whole for a luxe centerpiece.

Portion Size

Pickup available at Peter Augustus Store Camp Hill

Usually ready in 24 hours


Pure Indulgence in Every Slice

This Wagyu Sirloin Steak delivers an extraordinary eating experience, with a Marble Score of 6-7 producing rich, buttery marbling that melts beautifully through the meat. Each bite offers an intense depth of flavour and a succulent, tender finish that's simply unmatched.

The sirloin is celebrated for its perfect balance of bold, beef-forward flavour and refined tenderness. At this elite marble score, the intramuscular fat renders effortlessly during cooking, infusing every mouthful with luxurious juiciness and signature wagyu character.

Product Highlights

  • Premium Wagyu Sirloin Steak
  • Marble Score 6-7, exceptional marbling and tenderness
  • Ideal for grilling, barbecuing, or pan-searing
  • Boneless and portioned for consistent results
  • Vacuum sealed and delivered chilled

Cooking Inspiration

Let the marbling do the talking. Season lightly with sea salt, then sear over high heat for a short time on each side, allowing the rich intramuscular fat to render and caramelise. Rest well before slicing to lock in every drop of juicy flavour.

  • Cook to medium-rare for optimal flavour
  • Rest for 5–10 minutes before slicing
  • Pair with sea salt flakes, wasabi, or a light soy glaze

Delivery & Storage

Store at or below 4°C prior to cooking
Cook thoroughly before consumption.

The Wagyu Sirloin SB 6-7 is the ultimate steak experience, pure indulgence for those who demand the very best from their beef.

Frequently Asked Questions

Meat Quality & Colour

What is vacuum sealing and how does it extend shelf life?

Vacuum sealing removes air from the packaging, slowing oxidation and bacterial growth to extend freshness and shelf life. When stored correctly at 0–4°C, you can expect the following guide:

  • Beef primals & whole cuts: up to 28 days
  • Beef (steaks): up to 21 days
  • Beef (bone-in): up to 14 days
  • Lamb: up to 28 days
  • Pork: up to 10 days
  • Ham: up to 30 days
  • Sausages: up to 9 days
  • Chicken (frozen): up to 12 months
  • Salmon (frozen): up to 12 months
  • Smoked salmon: up to 30 days

For longer storage, keep products frozen at -18°C, where vacuum sealed meat can last 1 to 3 years depending on the cut and consistency of temperature.

Once opened, the shelf life reverts to that of standard fresh products, so we recommend consuming promptly.

For longer delivery routes, some items may arrive partially or fully frozen to ensure they remain within safe temperatures during transit.

Why is my steak dark in the vacuum pack?

Our beef is vacuum sealed to lock in freshness and extend shelf life by removing oxygen. This can cause the meat to appear darker or slightly purplish due to natural myoglobin, which is completely normal.

Once opened, simply let your steak rest out of the packaging for 10 to 20 minutes. As it’s exposed to air, it will “bloom” back to its natural rich red colour. Rest assured, your beef is fresh and perfectly safe to enjoy.

Is it safe to eat?

Yes. If the “Use By” date is within range your meat is fresh. Any colour variation from vacuum sealing is normal and will return to its natural red once opened and allowed to bloom.

SB Marble Scores

What is an SB Marble Score?

The SB Score measures intramuscular fat (the white flecks in the meat). Higher scores mean more marbling, which results in superior tenderness, juiciness, and a richer, buttery flavour.

Which score should I choose?

  • SB 0–2: Leaner, traditional beef flavour with a robust texture.
  • SB 3–5: Our "everyday premium" level; a perfect balance of flavour and tenderness.
  • SB 6–10: The indulgent peak, featuring extreme marbling for a melt-in-your-mouth experience.

Delivery & Packaging

What are your delivery fees?

We offer a range of pickup and delivery options to suit you:

  • Free pickup is available from our Camp Hill store in Brisbane. Simply select pickup at checkout.
  • Free shipping is available on subscription-only orders.
  • Free shipping is automatically applied to orders over $200.
  • Refrigerated delivery starts from $30 (including GST), with final pricing based on your location, order size, and weight. Enter your address at checkout to calculate the exact rate.

All delivery orders are packed in a food-safe, insulated chilled box with ice packs to maintain safe temperatures throughout transit.

Can I request custom cutting instructions?

Yes, our butchers are happy to accommodate custom cutting requests where possible and safe to do so. For example, you may like a rump cap portioned into steaks. Simply specify your preferred thickness or weight per piece, such as approximately 2.5cm or 300g portions.

You can add these instructions in the “View Cart” section before checkout using the notes box or send them through to us via email.

How is my order kept cold?

We use specialist refrigerated courier partners to keep your order within the cold chain from dispatch to delivery. Each order is packed in a thermal carton lined with VISYCELL® sustainable insulation, a food-grade, biodegradable material designed to maintain a consistent chilled temperature throughout transit.

We also include large 1kg ice gel packs in every box to help keep your products at optimal temperature. Our packaging has been tested to maintain safe temperatures for a few hours after delivery when left in a shaded area.

My box arrived looking a bit scuffed. Is the meat okay?

While the outer carton may show signs of handling during delivery, the internal insulation is specifically built to protect the contents and preserve freshness.

What should I do if I have concerns?

If you detect any issues with the temperature or seal of your products upon arrival, please contact our team immediately so we can find a solution for you.

Our Beef

Where does our beef come from?

All of our beef is from our parent company Stanbroke Beef. This is important as the quality of the beef and ultimately your eating experience is determined by the care that has been shown to the animal during each stage of the production process. Any undue stress the animal experiences at any stage of its life is detrimental to the beef it will produce.

As Stanbroke owns and operates each stage of the production process, strict best practices are followed to ensure the animals always receive the highest of care and that’s why at Peter Augustus we can guarantee the quality of our product each and every time.

Striploin

Striploin, also known as Sirloin, New York Strip, or Porterhouse (when bone-in), is a premium cut prized for its bold flavour and balanced tenderness. It comes from the short loin of the cow and features a fine grain with a satisfying bite. It's a favourite among chefs and home cooks alike for its generous marbling and robust, beefy taste.