Alpha series header
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Thread: Alpha series header

  1. #1
    Greenhorn Matty's Avatar
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    Alpha series header

    I am thinking about purchasing the alpha series header for my 2 door 2015 civic si . I was wondering what exhaust system you guys recommend. And if u know any links here for install .thanx .

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  3. #2
    Big Timer!!! 9thgensifamily's Avatar
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    Personally 3inch is overkill for N/A unless you like noise. 3inch no cat, and skunk 2 exhaust for over the top loud.
    I've got full race exhaust and it sounds good, but turbo tend to help reduce noise some. I've meet a N/A Civic Si owner that told me his full race exhaust he didn't like because it was too quite...so take that for what it's worth.
    Before turbo I had a RV6 catted down pipe on stock exhaust, and I loved it. I could hear the engine, but it was far from loud or annoying. The RV6 didn't need motor mounts to keep it from banging on the firewall, and I highly doubt theres power to be gained by going to 3".

    You may like loud, either way you may want to put your goals (power+quite/power+loud/future turbo/supercharging/nitrous).
    BlackSi27 likes this.

  4. #3
    Super Mod's Pet 12FG4Rallye's Avatar
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    Theres a few youtube videos on how to install a downpipe. The process is the same for all of them so just find a video that best helps you. Im running full race catted downpipe and full race exhaust and i love it. Catless is going to be much louder and produce a lot more drone and rasp. If thats aomething that doeant bother you then go for whatever setup you want. Go on youtube and just search different setups and see what you like.
    Follw me on IG: fl_fg4

    205 whp
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    Tuned by John Vega at Phearable

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  6. #4
    One Bad Mama Jama!!! TenZen's Avatar
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    Quote Originally Posted by 9thgensifamily View Post
    I've meet a N/A Civic Si owner that told me his full race exhaust he didn't like because it was too quite
    That dude must be going deaf because it's not even remotely close to quite. And I have RV6+Full race exhaust.
    Roadcourse and BlackSi27 like this.
    2015 Rallye Red Si Coupe
    Acuity Curl CAI, Hasport Torque Mount & Rear Motor Mount, Acuity Shift Linkage & Shifter Base Bushings, Acuity ESCO Shift Knob, BFGoodrich g-Force COMP-2 A/S, FKX RSB/LTB, SiriMoto FSB/RLTB, Full Race Cat-Back, RV6 Catted DP

  7. #5
    Big Timer!!! 9thgensifamily's Avatar
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    Quote Originally Posted by TenZen View Post
    Quote Originally Posted by 9thgensifamily View Post
    I've meet a N/A Civic Si owner that told me his full race exhaust he didn't like because it was too quite
    That dude must be going deaf because it's not even remotely close to quite. And I have RV6+Full race exhaust.
    He was a young guy, he came from a 8th gen with skunk2 exhaust, didn't say any other mods. I thought he was crazy too but chalked it up to maybe "louder=faster". I know a turbo makes it quieter, but who knows how much. If I catch him out again I'll inquire about this, and maybe make a video off of both cars.

  8. #6
    One Bad Mama Jama!!! TenZen's Avatar
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    Quote Originally Posted by 9thgensifamily View Post
    He was a young guy, he came from a 8th gen with skunk2 exhaust, didn't say any other mods. I thought he was crazy too but chalked it up to maybe "louder=faster". I know a turbo makes it quieter, but who knows how much. If I catch him out again I'll inquire about this, and maybe make a video off of both cars.
    As you soon as you said Skunk2, it makes a whole lot of sense now. Probably had the N1 and thing is stupid loud. If I had like a GoPro, I'd make a video of the FR+RV6.
    modrid81 likes this.
    2015 Rallye Red Si Coupe
    Acuity Curl CAI, Hasport Torque Mount & Rear Motor Mount, Acuity Shift Linkage & Shifter Base Bushings, Acuity ESCO Shift Knob, BFGoodrich g-Force COMP-2 A/S, FKX RSB/LTB, SiriMoto FSB/RLTB, Full Race Cat-Back, RV6 Catted DP

  9. #7
    Question Authority Roadcourse's Avatar
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    Any significant hp gains would require a lot of money, sacrifice engine life and durability and for little benefit. You're dealing with an economy car engine.
    Only the knife knows what goes on in the heart of the pumpkin......unknown

    Guns don't kill people, drivers on cell phones kill people.

    Drain the swamp. Force term limits.

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  10. #8
    Big Timer!!! 9thgensifamily's Avatar
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    Quote Originally Posted by Roadcourse View Post
    Any significant hp gains would require a lot of money, sacrifice engine life and durability and for little benefit. You're dealing with an economy car engine.
    Tell a civic owner it's not ideal to mod their car 😂.

  11. #9
    One Bad Mama Jama!!! TenZen's Avatar
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    Quote Originally Posted by Roadcourse View Post
    Any significant hp gains would require a lot of money, sacrifice engine life and durability and for little benefit. You're dealing with an economy car engine.
    Don't come in here with your logic and sense! Get outta here!
    2015 Rallye Red Si Coupe
    Acuity Curl CAI, Hasport Torque Mount & Rear Motor Mount, Acuity Shift Linkage & Shifter Base Bushings, Acuity ESCO Shift Knob, BFGoodrich g-Force COMP-2 A/S, FKX RSB/LTB, SiriMoto FSB/RLTB, Full Race Cat-Back, RV6 Catted DP

  12. #10
    Super Mod's Pet 12FG4Rallye's Avatar
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    Quote Originally Posted by Roadcourse View Post
    Any significant hp gains would require a lot of money, sacrifice engine life and durability and for little benefit. You're dealing with an economy car engine.
    Nobody likes a debby downer or a negative nancy lol
    Follw me on IG: fl_fg4

    205 whp
    174 wtq
    Tuned by John Vega at Phearable

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