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K-Tuned K-series Side Feed Intake Manifold - K20/K24
For K-Tuned's Intake Manifold project they partnered up with a long time friend and owner of Magnus Motorsports to design a performance intake manifold to properly fit multiple K-powered cars. They worked with Magnus previously when they helped out with a custom intake manifold on their awesome K20 powered RX7. Magnus is well known in the aftermarket industry for their high quality intake manifolds and they have been designing and welding up their own product for several years now. K-Tuned knew the Magnus design worked, but wanted to collaborate and find an overall manifold layout that addressed the fitment concerns on several different Honda chassis. Clearance to the rad support and the hood were areas that needed attention, so the plenum was lowered and runners shortened a little bit, while still keeping a clean entry angle into the head port. The result was exactly what K-Tuned was looking for, a big plenum, short runner, performance intake manifold that fits numerous vehicles.

This specific intake manifold design is being offered exclusively by K-Tuned and makes significant top end power gains over the factory intake manifold on both naturally aspirated and forced induction applications. The K-Tuned Intake Manifold features a very large 4.78L sheet metal plenum shaped in the signature tapered Magnus format. If you look closely at the plenum base and the TB flange, you'll find two custom 6061 billet aluminum pieces that are precision machined using a CNC 3D profiling process. This special CNC process is what ultimately helped make this manifold design possible, allowing K-Tuned to make the necessary multi-axis CNC cuts. The 90mm throttle body flange matches up perfectly to the plenum and is tapered inward to ensure there is no restriction to the incoming air. The throttle body bolt pattern matches up to the 86-93 Ford Mustang 5.0L specs, which means the  K-Tuned 90mm throttle bodie will bolt up seamlessly. The custom billet plenum base is a work of art, with four precision machined internal V-stacks that are designed to increase runner entry air speed.  Also provided are 3 x 1/8 NPT vacuum ports that are neatly tucked away on the plenum base, and positioned between each runner. The runners themselves, measure 5.75" long with a large diameter of 1.875", and are capable of supplying even heavily modified K-Series engines with plenty of air. The manifold flange at the cylinder head is available for K20 and K24 heads and is another 6061 billet piece, that maintains proper port entry and injector angles.

Included with the this manifold is a brushed aluminum K-Tuned Fuel Rail, which is held in place on a rail mount that is designed to keep the stock phenolic fuel rail spacers in place and accept both stock or aftermarket K-Series fuel injectors. As usual, K-Tuned includes all the hardware, specifically the bolts for mounting the manifold to the cylinder head and the 4 bolts for our throttle body. Last, but not least, an aluminum K-Tuned badge is placed on the front of the plenum to add a nice finishing touch!

Vehicle & Engine Applications:

  • K20A & K24Ax engine swaps into EG, DC2, EK (w/ EG subframe only)
  • 02-06 RSX
  • **06-11 Civic Si 2006-2011 (ie. 8th Gen Civic)
  • K20A/A2/A3 PRB style head
  • K20Z3 & K24A2 RBC style heads

**Note: Currently, this manifold fits the 06-11 Civic Si K20Z3 head but is NOT compatible with the 8th gen civic drive-by-wire throttlebody fitment. In the near future, Ktuned will be releasing a version of this manifold with a ZDX (J37) throttle body flange which will provide drive-by-wire throttlebody use.


NOTE: The stock water pump needs to be modified and a K-Tuned AC/PS Eliminator Pulley setup must be used.

Throttle body Fitment

  • K-Tuned 80mm and 90mm TB or any TB with a 86-93 Ford 5.0L Mustang flange

K-Tuned K-series Side Feed Intake Manifold - K20/K24

Regular price Sale $1,151.99 Sale price MSRP $1,279.99
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Free Shipping
Free standard shipping applies to this item within the continental United States. Orders shipped to Alaska, Hawaii, Virgin Islands, Canada, Puerto Rico, Guam, and PO/APO/FPO boxes are subject to additional shipping charges.
Ships: 1-5 business days
This is an estimated ship date once your order is placed from JHPUSA. Ship dates do not include weekends and holidays.
Brand:K-Tuned
SKU:KTD-INT-K20
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