We were given an opportunity to test out the lastest popular budget headers for the Bseries recently. All but the Skunk2 Alpha are designs that are replicas of the real deal.
Our test subject is a sexy 91 CRX SI with a stock 98 Spec JDM ITR Swap. Big thanks to Mickey G for letting us use his car.(Green CRX)
Mods include a Hondata S300 and an intake. We baselined using the OEM 4-1 header and used our 3 inch exhaust dump for every header.
Our test subjects are
Hytech Small Tube
To make the exhaust install and make everything easier we went ahead and hooked our 3 inch dump to the car. Each header is tuned for consistency.
Here is our baseline using the OEM 4-1 98 Spec Header
181/132 Pretty much what a stock ITR puts out.
Next up was the SMSP replica. Ground clearance is sweet, the design looks smaller and constructed much different from the real deal B19
Red Line is SMSP Replica / Blue Line is JDM ITR
Next up is RMF Narrow Replica. Fits nice, ground clearance is decent.
Red Line is RMF Narrow Replica / Blue Line is JDM ITR
Next up is Hytech Replica. Fitment is good, ground clearance is rough.
Blue Line is Hytech Replica / Green Line is JDM ITR
Next up is Skunk2 Alpha. Fitment is good, Ground clearance isnt the best, construction is great for the price.
Red Line is Skunk2 Alpha / Blue Line is JDM ITR
Next up is Toda Replica. Great Fitment, Good ground clearance - Simple and works.
Red Line is Toda Rep / Blue Line is JDM ITR
Here are some comparisons.....for the sake of comparisons
Hytech Replica vs. Skunk2 Alpha(The big header pairing debate!)
Blue Line is Hytech Replica / Red Line is Skunk2 Alpha - Midrange characteristic was similar when i threw the Skunk Alpha on a big 2.0L
Toda Fakie vs. Skunk2 Alpha
Red Line is Toda Fakie / Blue Line is Skunk2 Alpha
Toda Fakie vs. SMSP Replica
Red Line is Toda Fakie / Blue Line is SMSP Replica
RMF Narrow Replica vs Toda Fakie
Red Line is Toda Fakie / Green Line is RMF Narrow Replica
Toda Fakie vs. Hytech Replica
Red Line is Toda Fakie / Blue Line is Hytech Replica
Here is a cluster of all of them overlayed
Each header was individually tuned on the same day in a 3 hour window. Results will vary once modifications are done to the engine.
Any questions or suggestions on what might work for you please feel free to PM me. Also it'd be cool if you bought your header from someone who knows whats going to work instead of some kid selling parts out of his moms basement.
If there is a header needed for a specific setup there are a handful of really good header designers around here. Randy (NAH2B), SSR, ASP, SMSP, Hytech..etc..etc. If you're spending a ton of money on a nice built engine......compliment it with a custom header.