Exhaust tech question. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Ricks15 · 10-16-2005, 07:27 PM

I just had to buy the Biggest HKS Hi power Ti universal muffler (170mm) for my 240 yesterday at super autobacs, reason being that It looks cool but I heard that Im prob going to need to run 3inch piping do any of you guys think there is going to be a problem when I go to the muffler shop and tell them to do that because Isnt the flange on the cat that connects to the stock KA24E like only 2.5in????? Either way it going to be a custom job because a friend of mine did the same thing I want to do with a HKS hi power muffler but his was 130mm, he ran a straight pipe from the cat.

gasser · 10-16-2005, 09:00 PM

considering that the muffler you bought has a 6.75" tip, 3 inch may be all that fits on the inlet side of it. warning to you though: if you have a n/a motor, the 3 inch exhaust may cause a lot more problems than good.

Ichi-Go · 10-16-2005, 10:11 PM

It has been stated a million times and proven with a dyno. Even with NA KA 3 inch exhaust yields better results that 2.5 inch exhaust.

Get mandrel bends and a 3 inch flange and the exaust place should have no prob doing it for you.

Ricks15 · 10-16-2005, 10:26 PM

Wait so the flange on the cat has to be modified????

l33tmonkeyman · 10-16-2005, 10:29 PM

i have the ka24de s13 and i am running 3" cat-back. the flange bolts directly up to the cat's flange. It should be the same with the single cam engines.

***S14DB*** · 10-16-2005, 10:32 PM

Get a 22-24" long 3" resonator to go with it or you'll be hating life on the HW.

Ricks15 · 10-16-2005, 10:47 PM

Resonator? any name brands that wont totally kill the sound of the muffler??

***S14DB*** · 10-16-2005, 10:52 PM

anything that's a straight thru perforated core. Not louvered.

Ricks15 · 10-16-2005, 11:01 PM

Do you guys think the muffler shops otta have performance resonators that arn't cheepy

***S14DB*** · 10-16-2005, 11:46 PM

Magnaflow dealer?

10-16-2005, 07:27 PM	#1
Ricks15 Nissanaholic! Join Date: Apr 2005 Location: Los Angeles, CA Age: 39 Posts: 1,661 Trader Rating: (1) Feedback Score: 1 reviews	Exhaust tech question. I just had to buy the Biggest HKS Hi power Ti universal muffler (170mm) for my 240 yesterday at super autobacs, reason being that It looks cool but I heard that Im prob going to need to run 3inch piping do any of you guys think there is going to be a problem when I go to the muffler shop and tell them to do that because Isnt the flange on the cat that connects to the stock KA24E like only 2.5in????? Either way it going to be a custom job because a friend of mine did the same thing I want to do with a HKS hi power muffler but his was 130mm, he ran a straight pipe from the cat.

10-16-2005, 09:00 PM	#2
gasser Leaky Injector Join Date: Jun 2005 Location: Henderson, KY Age: 39 Posts: 57 Trader Rating: (0) Feedback Score: 0 reviews	considering that the muffler you bought has a 6.75" tip, 3 inch may be all that fits on the inlet side of it. warning to you though: if you have a n/a motor, the 3 inch exhaust may cause a lot more problems than good. __________________ 92 RPS13

10-16-2005, 10:32 PM	#6
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Get a 22-24" long 3" resonator to go with it or you'll be hating life on the HW. __________________ Comments should be taken as Opinions not as Statements of Fact

10-16-2005, 10:52 PM	#8
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	anything that's a straight thru perforated core. Not louvered. __________________ Comments should be taken as Opinions not as Statements of Fact

10-16-2005, 11:46 PM	#10
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Magnaflow dealer? __________________ Comments should be taken as Opinions not as Statements of Fact

10-16-2005, 10:11 PM	#3
Ichi-Go Leaky Injector Join Date: Jan 2004 Location: Jacksonville,FL Age: 37 Posts: 122 Trader Rating: (0) Feedback Score: 0 reviews	It has been stated a million times and proven with a dyno. Even with NA KA 3 inch exhaust yields better results that 2.5 inch exhaust. Get mandrel bends and a 3 inch flange and the exaust place should have no prob doing it for you.

10-16-2005, 10:26 PM	#4
Ricks15 Nissanaholic! Join Date: Apr 2005 Location: Los Angeles, CA Age: 39 Posts: 1,661 Trader Rating: (1) Feedback Score: 1 reviews	Wait so the flange on the cat has to be modified????

10-16-2005, 10:29 PM	#5
l33tmonkeyman Zilvia Member Join Date: Jul 2004 Location: Prior Lake, MN Age: 39 Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	i have the ka24de s13 and i am running 3" cat-back. the flange bolts directly up to the cat's flange. It should be the same with the single cam engines.

10-16-2005, 10:47 PM	#7
Ricks15 Nissanaholic! Join Date: Apr 2005 Location: Los Angeles, CA Age: 39 Posts: 1,661 Trader Rating: (1) Feedback Score: 1 reviews	Resonator? any name brands that wont totally kill the sound of the muffler??

10-16-2005, 11:01 PM	#9
Ricks15 Nissanaholic! Join Date: Apr 2005 Location: Los Angeles, CA Age: 39 Posts: 1,661 Trader Rating: (1) Feedback Score: 1 reviews	Do you guys think the muffler shops otta have performance resonators that arn't cheepy