New Headers! MagnaFlow headers. VIDS UP! - Page 2 - Lexus IS Forum
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post #16 of 83 (permalink) Old 03-25-2010, 11:11 PM Thread Starter
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Greddy full Catback, Stock y-pipe, MAGNAFLOW HEADERS PLUS CAT BANK 1 AND 2, stock intake. and it honestly feels like 20+hp. it was very noticeable.

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post #17 of 83 (permalink) Old 03-26-2010, 01:02 AM
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Hehe, this is a cool story. +rep!

[2003 Black Onyx IS300][SRT Intake][Tokico Illumina's+H&R Springs][Gold 18’’ O.Z. Crono’s+General Atlimax HP Tires 225/40][HID 6000K Low Beams][Amuse Front Lip][Altezza Window Visors][3" SRT Catback Exhaust][SRT Intake+Recu]
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post #18 of 83 (permalink) Old 03-26-2010, 07:15 AM
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Thanks for the pics. Seems the Magnaflow header is just a replacement for the stock unit with the catalytic converters and everything...

Even though they're a better design then the factory piece, I honestly can't see much of a performance gain.

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post #19 of 83 (permalink) Old 03-26-2010, 10:54 AM
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throw on a intake get more sound and a few extra hp. Sounds pretty good too.

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post #20 of 83 (permalink) Old 03-26-2010, 01:33 PM
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Whats interesting here is for us Cali guys this gives you a stock looking piece that should pass smog and still give you a hp increase.
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post #21 of 83 (permalink) Old 03-26-2010, 01:38 PM Thread Starter
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im probably going to get the JoeZ tube.. and a K&N Filter. then later save up for a full SRT.

GGP 03 IS300 Sports Design
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post #22 of 83 (permalink) Old 03-26-2010, 01:46 PM
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Quote:
Originally Posted by zfury01 View Post
Greddy full Catback, Stock y-pipe, MAGNAFLOW HEADERS PLUS CAT BANK 1 AND 2, stock intake. and it honestly feels like 20+hp. it was very noticeable.
ahh the infamous butt dyno.....

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post #23 of 83 (permalink) Old 03-26-2010, 02:45 PM Thread Starter
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i mean ofc. lol ill try and dyno it asap.

GGP 03 IS300 Sports Design
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post #24 of 83 (permalink) Old 03-26-2010, 03:41 PM
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Sorry you prob didnt get 20rwhp from headers...To me they are over priced , they sound just like my headers did with a greddy evo II ...see the same numbers if not lower then a set of ebay headers and sound the same with same exhaust mods.....

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post #25 of 83 (permalink) Old 03-26-2010, 11:43 PM Thread Starter
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.................

GGP 03 IS300 Sports Design
- Enkei - Alpine - Greddy - Altezza -Megan - JoeZ -CXRacing - Hotchkis - NRG - Magnaflow - Flashtech - HKS -BLOX -TRD -

Last edited by zfury01; 04-25-2010 at 09:20 PM. Reason: Dumb Response.
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post #26 of 83 (permalink) Old 03-27-2010, 12:48 PM
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Quote:
Originally Posted by zfury01 View Post
Sorry, maybe u cant read. but i said it FEELS like +20hp. and yea prob not, you didnt pay for it, and alot of sh%$ is overpriced. if your happy with ebay mods, go for it, no ones stopping you. ebay ur car up bro.
Your statement shows your age...I was just giving my opinion this is the internet ...You know nothing about me and I'm NOT your BRO ...

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post #27 of 83 (permalink) Old 03-27-2010, 06:44 PM Thread Starter
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Your statement shows your age...I was just giving my opinion this is the internet ...You know nothing about me and I'm NOT your BRO ...
lol.. and my age has what to do with this again?

But thank you for your opinion. and sorry for replying in an immature way.

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post #28 of 83 (permalink) Old 03-28-2010, 01:06 PM
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if the magna's have cats then i dont think its worth it

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post #29 of 83 (permalink) Old 03-28-2010, 10:42 PM
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It has their high flow cats built in, and here in California that might make it worth it, Your still gaining something over the stock setup.
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post #30 of 83 (permalink) Old 03-29-2010, 12:54 PM
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true,
but for that much dollar pshh

2005 IS300 MSM 5spd /JL and Eclipse custom sound system/5%tint/SRT/HKS/Mazzuri/PIAA

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