This is one of the single best (and cheapest) mods you can do to your Prelude... for those that don't know, this insulating gasket will help reduce the effect of heat soak from the head heating the intake manifold. See here for my writeup on the S2000:
The results are the same on all engines- basically, the head heats the manifold which contributes to increased intake charge temps which means you are losing air density. Further, the ECU will pull out timing at certain temps which reduces power even more. You basically won't find as cheap a power added our there as the manifold, DR on the board gained 6WHP pretty much across the board after adding this. It doesn't add as much as it prevents hot weather from taking away (we all know what hot weather does to driveability). Just like a CAI helps with power, so does the insulator.
Installation DOES require removal of the manifold which is no simple task. In about 4-6 hours just about anyone can do it, though.
Details:
- Price is $58 shipped Priority mail within the US. Email for int'l shipping.
- Insulators are in stock and ready to ship!
H22A (92-01 Prelude VTEC):
B16A/B18C5 (ITR, CTR, DOHC VTEC Civic Si):
D16Z/Y (SOHC VTEC Civic EX):
B18C (Integra GS-R, not Type R):
B18A/B18B (Integra GS/LS):
"Small" K Series (2k1 Civic, CR-V, RSX):
K24 (2k1 Accord, TSX, Element):
F20C/F22C (S2000):
Sorry, but there is not one available for the H23A yet. If you are interested, PM me, and if there is enough interest we can get Hondata to make one.
That's a good price
We don't deal with Hondata so I bought mine 6 months ago for $60 and that was the lowest price anywhere (I looked). Jump on this guys!
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If you are mechanically inclined, around 3 hours on the base, a little longer on the SH (bolts are harder to reach). With the engine out of the car it's literally tens of minutes.
I was going to start a new thread, but i figure I'll just ask here. I've heard from someone that this mod will prevent me from passing the OBDII check for emissions in NJ. I don't see how that's true, but could you shed some light on this marcucci? thanks
I was going to start a new thread, but i figure I'll just ask here. I've heard from someone that this mod will prevent me from passing the OBDII check for emissions in NJ. I don't see how that's true, but could you shed some light on this marcucci? thanks
That doesn't make any sense.... If that were the case, on a cold day, your car would never pass emissions.
The only thing the insulator gasket does is lower the thermal transmission between the head and the intake manifold. It also allows the the manifold to cool much faster than it normal does when you are driving at a high rate of speed with the throttle open.
I was going to start a new thread, but i figure I'll just ask here. I've heard from someone that this mod will prevent me from passing the OBDII check for emissions in NJ. I don't see how that's true, but could you shed some light on this marcucci? thanks
The older Hondata gasket used to block off the EGR port, which will cause you to fail an OBDII emissions check. The new gaskets do not block the port so they will not cause you to fail emissions testing.
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The older Hondata gasket used to block off the EGR port, which will cause you to fail an OBDII emissions check. The new gaskets do not block the port so they will not cause you to fail emissions testing.
Very true. The change was made more than a year ago. All the units I have in stock are the "new" kind. Hondata originally blocked the port to reduce manifold heating but neglected to worry about the OBD2 issue. They have since opened up the hole and it's no longer an issue.
I have found, though, that on vehicles with the older gasket that the gasket actually punched through from the heat of the exhaust gas- so it will only be an issue for a while, probably the first few weeks or months.
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