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Elite Edition

What is the difference between a K24A2 and k24z3?

Author

Andrew Henderson

Published Mar 22, 2026

What is the difference between a K24A2 and k24z3?

The major advantage to our original K24A2 swap is the naturally aspirated power potential. A K24Z3 engine is a very solid option for 200-210whp, but in order to make much more power, a K20 head (or K24A2 head) needs to be swapped on, which comes with its own share of complications.

Will a K20A head swap work on a K24A2?

Guys essentially the point of the K20a Head swap onto the other K24’s is to gain ‘3 lobe Vtec’ something the Unique K24a2 already has except more displacement than a K20 and less compression so it has more potential…At 11:5.1 ‘which is native to the K20a2’ the K24a2 will easily out perform the K20a2. It’s only 10:5.1 or so.

How much power does a Honda K24A2 engine make?

Even stock, most customers with a K24A2 will make 220+whp, and 300+whp N/A engine builds have been common for years. This is the primary reason why the K24A engines are still the first choice for Honda engine builders worldwide, and also why the K24A2 engines carry a premium over their newer counterparts.

What kind of pistons do I need for a K24A4?

If using a K24a4 block the pistons will need to be swapped with aftermarket or a1, a2 pistons to avoid valve to piston contact. This engine is found in the (06-07) Honda Accord and (07-08) Honda Element.

What is a K24A2 swap?

Our original K24A2 swap uses an aftermarket tubular subframe to provide adequate clearance for a true 4-2-1 style race header. Fitting proper length primary and secondary runners and merge collectors takes up space, and the tubular subframe gives us the space we need.

Is there still a place for the k24z3 engine?

Since the K24Z3 engine has it’s limitations, we do still feel there will always be a place for our original K24A2 swap, but the K24Z3 is a very attractive option for customers looking for a simple and reliable 200+whp. Our original K24A2 swap uses an aftermarket tubular subframe to provide adequate clearance for a true 4-2-1 style race header.