Cutting off HKS Hi-Power Exhaust resonator

haddy98 · 04-19-2011, 08:12 PM

Hi guys,

I just want to ask your opinions on something. I just recently installed the HKS Hi-Power Exhaust for my 370z and it doesn't make that much of a sound inside the car. I asked a friend of mine to drive it and let me listen to it. It sounds pretty good from the outside but there seems to be something that's making the sound less louder. A few friends of mine asked me to cut the resonator off and replace it with straight pipes instead. The resonator is located at the H pipe. Has anyone done this before for their 370? How does it sound like? I'm also planning to change my HFC in the near future. How will that sound like after getting rid of the resonator? Hope you guys can help me out.

Thanks in advance

red6spd · 04-19-2011, 08:41 PM

I would wait untill you do HFC's before you chop up your expensinve exhaust. Wait and see what it sounds like with the HFC then make a decision.

haddy98 · 04-19-2011, 08:58 PM

Yeah, sounds like a good idea. But when i change my HFC, will the warning engine light come on? I heard from people that it would

AK370Z · 04-19-2011, 11:47 PM

Please don't! That's the beauty of this fantastic exhaust! It sounds quiet when you're driving your Z on the highway or on the road at low rpm, but the moment you open the throttle up, the canisters are bypassed and sounds absolutely exotic. As the RPMs rise, the sound increases. I love every moment with it. It rarely has any drone at any RPM and I have done 4 hour continuous road trip with 0 headache. This exhaust is probably one of the well built and intelligently designed exhaust for 370Z. If you wanted something loud and with straight pipes, there's a Magnaflow exhaust for sale of $800. Sell this HKS and buy one of those. I do not recommend cutting this beautiful exhaust. Just my

red6spd · 04-20-2011, 12:37 AM

Quote:

Originally Posted by haddy98

Yeah, sounds like a good idea. But when i change my HFC, will the warning engine light come on? I heard from people that it would

It is very possible that it might. What brand do you plan on getting???? Worst comes to worse you can just get the car UpRev tuned and have the CEL tuned out.

Jordo! · 04-20-2011, 01:54 AM

Also... it is all too easy to cause weird rattles and hisses on this motor as you experiment with the exhaust system.

Wait until after the HFC's.

Jose Aliling · 04-20-2011, 02:00 AM

replace your stock ones with these

AAM Competition 370Z Test Pipes

or if you want more bling then put these instead

(Š”)ƒpƒ[ƒnƒEƒXEƒAƒ~ƒ…[ƒY - Z34 FAIRLADY Z | PARTS - R1 SPORTS-CAT

sound will definitely improve.

KillerBee370 · 04-20-2011, 02:45 AM

You bought an exhaust just to have it sound loud in the car??

You could've saved money and just cranked up the stereo.

haddy98 · 04-20-2011, 04:32 AM

Quote:

Originally Posted by red6spd

It is very possible that it might. What brand do you plan on getting???? Worst comes to worse you can just get the car UpRev tuned and have the CEL tuned out.

I plan on getting Berk's.. But I've done some research and some people have custom made the HFC with good stainless steel material. What do you think of that?

haddy98 · 04-20-2011, 04:33 AM

Quote:

Originally Posted by Jose Aliling

replace your stock ones with these

AAM Competition 370Z Test Pipes

or if you want more bling then put these instead

(Š”)ƒpƒ[ƒnƒEƒXEƒAƒ~ƒ…[ƒY - Z34 FAIRLADY Z | PARTS - R1 SPORTS-CAT

sound will definitely improve.

thanks! i will consider these!

B996 · 04-20-2011, 08:42 PM

We can trade, Ill get you straight pipes and ill take your cbe

dark_nismo · 04-21-2011, 10:56 PM

I would 'NOT' mess with a well made exhaust. Just like others have stated, install H.F.C's. I did. HKS W/ F.I H.F.C'S, No Light. Very satisfied.

B.A.Q · 04-21-2011, 11:04 PM

I had the same thing when I got my GReddy but wanted it to be a little loader. so got the HFCs and try them you will get an awesome sound don't do anything to that exhaust that will loss its value. HFC for a deeper sounds and good gains. or test pipes for laud and raspy sound with more gains.

Footloose301 · 04-22-2011, 07:53 AM

Dont you dare ruin that exhaust lol!

I just finished up bolting on some GTM Resonated Test Pipes and it's quite a bit louder, deeper, and more powerful!!!!

This hiss of our VQ's might get to be annoying but I'm happy now.

haddy98 · 04-23-2011, 02:12 PM

Thanks guys. I'm planning to get my test pipes by the end of the month. I'm sure from the comments you gave, it will sound awesome!

04-19-2011, 08:12 PM	#1 (permalink)
haddy98 Base Member Join Date: Apr 2011 Location: Brunei Posts: 25 Drives: 09 Nissan 370z M6 Rep Power: 14	Cutting off HKS Hi-Power Exhaust resonator Hi guys, I just want to ask your opinions on something. I just recently installed the HKS Hi-Power Exhaust for my 370z and it doesn't make that much of a sound inside the car. I asked a friend of mine to drive it and let me listen to it. It sounds pretty good from the outside but there seems to be something that's making the sound less louder. A few friends of mine asked me to cut the resonator off and replace it with straight pipes instead. The resonator is located at the H pipe. Has anyone done this before for their 370? How does it sound like? I'm also planning to change my HFC in the near future. How will that sound like after getting rid of the resonator? Hope you guys can help me out. Thanks in advance

04-19-2011, 08:41 PM	#2 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	I would wait untill you do HFC's before you chop up your expensinve exhaust. Wait and see what it sounds like with the HFC then make a decision. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

04-19-2011, 11:47 PM	#4 (permalink)
AK370Z Administrator Join Date: Sep 2008 Location: NJ Posts: 9,930 Drives: 09 370Z MB Sports M6 Rep Power: 10	Please don't! That's the beauty of this fantastic exhaust! It sounds quiet when you're driving your Z on the highway or on the road at low rpm, but the moment you open the throttle up, the canisters are bypassed and sounds absolutely exotic. As the RPMs rise, the sound increases. I love every moment with it. It rarely has any drone at any RPM and I have done 4 hour continuous road trip with 0 headache. This exhaust is probably one of the well built and intelligently designed exhaust for 370Z. If you wanted something loud and with straight pipes, there's a Magnaflow exhaust for sale of $800. Sell this HKS and buy one of those. I do not recommend cutting this beautiful exhaust. Just my ped likes this. __________________ The370Z Signature Pictures ll Want to rock our forum decals on your car? Then click here! ll How to Embed YouTube Videos In a Post STOP! (Hammertime) ll Become a Premium Member Click HERE ll F.A.Q. Are You a Nissan Dealer? Click Here to Become A "Supporting Dealer" and Start Listing Your 370Zs In Our Inventory Section My Monterey Blue Z ll My Exhaust --> My Intake --> G3 Nissan's Official Response Regarding Oil Temp Issue: CLICK HERE Need a Set of Cheap Winter wheels /Tires? Then Visit The Banner Link Below and Place Your Order. You'll Help Keep The370Z Alive.

04-20-2011, 01:54 AM	#6 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Also... it is all too easy to cause weird rattles and hisses on this motor as you experiment with the exhaust system. Wait until after the HFC's. __________________ Enjoy it. Destroy it.

04-20-2011, 02:00 AM	#7 (permalink)
Jose Aliling Enthusiast Member Join Date: Aug 2010 Location: Manila Posts: 298 Drives: tricycle Rep Power: 15	replace your stock ones with these AAM Competition 370Z Test Pipes or if you want more bling then put these instead (Š”)ƒpƒ[ƒnƒEƒXEƒAƒ~ƒ…[ƒY - Z34 FAIRLADY Z \| PARTS - R1 SPORTS-CAT sound will definitely improve. __________________ http://www.farmofminds.com/2012/10/r...hp-garage.html

04-19-2011, 08:58 PM	#3 (permalink)
haddy98 Base Member Join Date: Apr 2011 Location: Brunei Posts: 25 Drives: 09 Nissan 370z M6 Rep Power: 14	Yeah, sounds like a good idea. But when i change my HFC, will the warning engine light come on? I heard from people that it would

04-20-2011, 02:45 AM	#8 (permalink)
KillerBee370 A True Z Fanatic Join Date: Mar 2009 Location: So Cal baby! Age: 51 Posts: 5,964 Drives: with passion Rep Power: 321	You bought an exhaust just to have it sound loud in the car?? You could've saved money and just cranked up the stereo.

04-20-2011, 08:42 PM	#11 (permalink)
B996 Base Member Join Date: Sep 2010 Location: Georgia Posts: 68 Drives: 2010 370z Rep Power: 15	We can trade, Ill get you straight pipes and ill take your cbe

04-21-2011, 10:56 PM	#12 (permalink)
dark_nismo Base Member Join Date: Jan 2011 Location: L_A Posts: 64 Drives: 2009 370z Nismo Blk Rep Power: 14	I would 'NOT' mess with a well made exhaust. Just like others have stated, install H.F.C's. I did. HKS W/ F.I H.F.C'S, No Light. Very satisfied.

04-21-2011, 11:04 PM	#13 (permalink)
B.A.Q Enthusiast Member Join Date: Feb 2011 Location: Phoenix,Az Posts: 302 Drives: Touring 370z Rep Power: 14	I had the same thing when I got my GReddy but wanted it to be a little loader. so got the HFCs and try them you will get an awesome sound don't do anything to that exhaust that will loss its value. HFC for a deeper sounds and good gains. or test pipes for laud and raspy sound with more gains. __________________ SOLD!! 09 370z Touring MT: GReddy Ti-C CBE - Berk HFC - Stillen 3G CAI '11 Mustang GT/CS 5.0 MT

04-22-2011, 07:53 AM	#14 (permalink)
Footloose301 A True Z Fanatic Join Date: Apr 2010 Location: Naples, FL Posts: 2,659 Drives: 40th Rep Power: 21	Dont you dare ruin that exhaust lol! I just finished up bolting on some GTM Resonated Test Pipes and it's quite a bit louder, deeper, and more powerful!!!! This hiss of our VQ's might get to be annoying but I'm happy now. __________________ 2010 40th Anniversary 370Z

04-23-2011, 02:12 PM	#15 (permalink)
haddy98 Base Member Join Date: Apr 2011 Location: Brunei Posts: 25 Drives: 09 Nissan 370z M6 Rep Power: 14	Thanks guys. I'm planning to get my test pipes by the end of the month. I'm sure from the comments you gave, it will sound awesome!

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