NEON SRT-4 GATZ “KILLER” BILLET MIDSHAFT – 1000WHP+

BUILT AFTER EVERYTHING ELSE FAILED.

For the Dodge Neon SRT-4, 1000+ WHP changes the rules.

We learned that the hard way.

Before this version existed, we tested two different billet midshafts from reputable companies.

• One broke after 3 passes
• The other broke after 12 passes

Both were “billet.”
Both were “upgraded.”
Neither survived repeated 1.4x–1.5x 60ft launches on a 1000+ HP drag car.

Stronger material alone wasn’t enough.

The problem was spline size.

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THE REAL WEAK POINT: SPLINES

Most aftermarket billet shafts use 26mm splines — same basic architecture as stock.

Even in better material, 26mm splines cannot survive repeated shock loads at 4-digit power.

So we did something different.

We partnered with Gatz to engineer a completely oversized solution.

Our Killer Midshaft uses 34mm splines.

That’s a 31% increase in diameter.

More engagement.
More surface area.
More shock resistance.
More survival under violent clutch hits.

This isn’t an upgraded stock shaft.

It’s a redesigned one.

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2 YEARS OF REAL-WORLD TESTING

This shaft was tested for 2 full seasons on our shop drag car.

Results:

• 8.8 second quarter mile
• 178mph trap speed
• Numerous 1.4x 60ft launches
• Zero failures
• Zero deformation
• Perfect structural integrity after 2 years

It held where every other option didn’t.

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BUILT FOR REAL DRAG CARS

If your setup includes:

✔ 900–1300+ WHP
✔ Aggressive clutch
✔ Slicks
✔ Liberty dogbox
✔ 9,000–10,000+ RPM shifts

You are outside OEM geometry.

This shaft was engineered specifically for that environment.

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WHAT MAKES IT DIFFERENT

This isn’t incremental improvement.

It’s structural overkill.

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IMPORTANT FITMENT INFORMATION

Because of the massive 34mm splines:

➤ Stock-size carriers DO NOT work.

If you do not have a 24x Racing carrier, this midshaft will not fit.

You must select the proper options.

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AVAILABLE OPTIONS

1️⃣ Custom Billet Carrier (Recommended)

Includes:

• Custom carrier
• Oversized bearing
• Designed specifically for 34mm splines

Required unless you already own our carrier.

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2️⃣ New Axle Hub Top (Required for conversion)

Since we increase from 26mm to 34mm splines:

• Your existing passenger-side axle hub must be cut
• Machined
• Replaced with our oversized hub top
• Professionally welded

You must have this hub top installed for the shaft to work.

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3️⃣ Hub Machining & Welding Service (Optional)

If you prefer us to handle it:

• Ship your full passenger-side axle
OR
• Remove clamp & boot and ship just the hub (saves on shipping)

We will:

✔ Machine it
✔ Weld the new oversized hub
✔ Return it ready to install

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IMPORTANT NOTES

*** These kits are made to order. Expect 2–4 months lead time before shipping. ***

*** This shaft does NOT include splines for VSS (vehicle speed sensor). You must run an external speed sensor. ***

*** Product images may show multiple components. With purchase you will receive:
• 1 midshaft
• 1 carrier (if option selected)
• 1 hub top (if option selected) ***

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WHO THIS IS FOR

• Dedicated drag builds
• 900–1300+ WHP setups
• Builders chasing 1.4x 60fts
• Serious XFWD competitors
• Anyone tired of replacing “upgraded” shafts

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WHO THIS IS NOT FOR

• Stock turbo cars
• Mild street builds
• 500–600whp setups
• Budget-first builds

This is race hardware.

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FINAL WORD

At 1000+ WHP, you don’t need “stronger.”

You need bigger.

Bigger splines.
Bigger engagement.
Bigger margin of safety.

Every other shaft broke.

This one didn’t.

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🔥 IF YOU’RE BUILDING A REAL 4-DIGIT SRT-4 — STOP USING 26MM SPLINES.

Step up to 34mm.

Upgrade once.
Launch hard.
Win rounds.