Skunk2 Alpha K20 Connecting Rods for Civic Si & RSX

If you’re leaning on your K20, these Skunk2 K20 connecting rods are the parts you want to trust at redline. The Alpha Series connecting rods drop into K20A and K20Z engines and work perfectly in Honda Civic Si and Acura RSX Type-S builds that see real abuse, street, drag, or road course.

Skunk2 builds these precision-forged K20 rods from 4340 chromoly steel with a straight H-beam design, so you get serious strength without turning your rotating assembly into an anchor. People run these in 700–900+ hp turbo K20s on E85, and the rods hold up when the tune’s on point. If you’re hunting K20A engine rods for sale or want to buy Skunk2 RSX K20 rods that won’t fold under boost, this is the set.

Each Alpha Series rod goes through proper heat-treating, tempering, and shot-peening, so you don’t just get shiny Honda K20 chromoly rods, you get parts that actually survive det, high RPM, and long pulls. Skunk2 also magna-flux tests every rod to catch cracks before they ever see your block. Whether you’re piecing together a 500hp street Civic or a 900hp drag RSX, these high-performance connecting rods for the K20 give you the strength and consistency you need without “race team” pricing.

Features

• 4340 Chromoly Steel: Real K20 abuse ready. This material handles serious cylinder pressure and high RPM better than stock powdered rods ever will.
• Straight H-Beam Design: Skunk2 H-beam connecting rods keep weight in check while staying stiff enough for 900+ hp turbo or high-comp builds.
• Heat-Treated & Tempered: You get consistent strength from rod to rod, which matters when you’re spinning 8,500+ rpm and don’t want one weak link.
• Shot-Peened Surface: Reduces stress risers on the rod, which helps prevent fatigue cracks on hard-used track and drag cars.
• Magna-Flux Tested: Every rod gets checked for microscopic flaws before it ever gets boxed, so you’re not the one who “finds the bad one” at 30 psi.
• Rated for 900+ HP: Realistically, if your tune’s safe and your machine work is right, these rods handle more power than most street K20 builds will ever see.
• Precision Machining: Big-end and small-end dimensions stay tight, so your bearings live longer and your piston-to-wall and pin clearances stay where your builder set them.
  
  

Commonly Asked Questions

What engines do these rods fit?

These Skunk2 Alpha Series connecting rods drop into the following K-series engines:

• K20A2
• K20Z1
• K20Z3

If you’re searching specifically for K20 Alpha connecting rods to buy for a Civic or RSX build, this is the exact set you want.

What cars can run these rods?

You can run these Alpha Series connecting rods in the following factory K20 cars (or K-swapped chassis using these engines):

• Acura RSX Type-S: 2002–2006 (RSX K20 connecting rods Skunk2 compatible)
• Honda Civic Si: 2006–2011 (perfect if you want Skunk2 Civic Si rods online for boosted or high-comp builds)
  
  

How much power do these rods actually handle?

Skunk2 rates the Alpha Series rods for 900+ hp. In the real world, plenty of people run them in 700–800 hp turbo setups with no drama as long as the tune, fuel, and clearances are right. If you’re on a stock block at 400–600 hp, these rods won’t be your weak point—your sleeves will.

What makes these different from other K20 rods?

Alpha Series rods sit in a sweet spot: they cost less than a lot of “boutique” brands, but you still get forged 4340 material, real QC (heat-treat, shot-peen, magna-flux), and a straight H-beam that’s proven in K20 drag and time-attack cars. They’re not the lightest rods on the planet, but that extra material is what lets you push big boost without bending something.

If you’re ready to purchase Skunk2 K20 rods and want a set you can trust on a hard-used Civic or RSX, these Alpha Series rods RSX and Civic owners keep running have already done the proving for you.