PeakBoost exhaust manifold questions! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

angzt · 11-24-2010, 02:50 AM

I have PeakBoost's top mount exhaust manifold.

It has a T3 flange on it. They don't include studs with the manifold?!!

So I needed some T3 studs...
I did some research and found that late 1980's 300ZX has T3 flange.
I ordered those studs from Nissan p/n# 14416-V5300

THEY DON'T FIT! WTF! They are too big!

My question is, does anybody have this PeakBoost manifold and how did they attach their turbo? I have a Garrett T3/TO4E

Thanks

importdude · 11-24-2010, 04:23 AM

lol

they most likely use 10x1.25 or 10x.1.50

u can use bolts also pending clearance

angzt · 11-24-2010, 04:33 AM

I tried bolts but because of the twin scroll design I have very little access to the bottom side of the flange.

Do you know where in particular I can buy these sized studs?
Hardware store? Automotive store?
Do they have to be a special because of their exposure to high temperature?

p.s. - i would call peakboost and ask them what thread sizes but i heard they are currently in shambles... which is not surprising.
It took me 6months to receive my manifold, turbo, wastegate. After countless hours on the phone with KEN, a BBB dispute, and multiple claims with AMEX.
I finally received everything in separate shipments..
I had the manifold ceramic coated and they did a piss poor job. It chipped in one place due to poor surface preparations. I just pray to god my welds are good.

Colorado S14 · 11-24-2010, 06:21 AM

The peakboost manifolds are not metric threads IIRC, I think you need a domestic stud. Take it to a bolt shop and figure it out.

mct3351 · 11-25-2010, 12:18 PM

They are not metric. Take it to Ace with you, that's where I got mine. Make sure you get grade 8 or stainless nuts.

drifter_for_life06 · 11-25-2010, 12:43 PM

its as simple as drilling and tapping it to whatever size stud you want to use if you cant find the correct one

kamilitaryman · 01-05-2011, 08:25 AM

I think its 3/8" 16tpi

niscur29 · 01-05-2011, 07:16 PM

I used bolts and with my precision 50 trim it was a ROYAL pain in the ass to get one of them that is almost directly under the center section. Needing a friggen crows foot, swivel, extension and it still worries me. If I ever get bored and decide to take it off im switching to studs and nuts. I do believe they were 3/8" its been a while since I replaced them with I did my build.

s15specR · 01-05-2011, 07:20 PM

Studs are 3/8, ACE Hardware should have some decent grade ones to use temporarily.

11-24-2010, 02:50 AM	#1
angzt Leaky Injector Join Date: Jun 2010 Location: NJ Posts: 86 Trader Rating: (6) Feedback Score: 6 reviews	PeakBoost exhaust manifold questions! I have PeakBoost's top mount exhaust manifold. It has a T3 flange on it. They don't include studs with the manifold?!! So I needed some T3 studs... I did some research and found that late 1980's 300ZX has T3 flange. I ordered those studs from Nissan p/n# 14416-V5300 THEY DON'T FIT! WTF! They are too big! My question is, does anybody have this PeakBoost manifold and how did they attach their turbo? I have a Garrett T3/TO4E Thanks

11-24-2010, 04:23 AM	#2
importdude Zilvia FREAK! Join Date: Nov 2006 Location: san j0 Posts: 1,391 Trader Rating: (19) Feedback Score: 19 reviews	lol they most likely use 10x1.25 or 10x.1.50 u can use bolts also pending clearance __________________ built ka-t

11-25-2010, 12:43 PM	#6
drifter_for_life06 Zilvia Addict Join Date: Sep 2005 Location: New Freedom, PA Age: 36 Posts: 775 Trader Rating: (6) Feedback Score: 6 reviews	its as simple as drilling and tapping it to whatever size stud you want to use if you cant find the correct one __________________ RPS13: +.020" 2871r 264's AEM EMS http://enjukuracing.com/#_l_4s

01-05-2011, 08:25 AM	#7
kamilitaryman Zilvia Junkie Join Date: May 2008 Location: Buffalo, NY Age: 42 Posts: 377 Trader Rating: (14) Feedback Score: 14 reviews	I think its 3/8" 16tpi __________________ 400HP KA24DET in progress

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

11-24-2010, 04:33 AM	#3
angzt Leaky Injector Join Date: Jun 2010 Location: NJ Posts: 86 Trader Rating: (6) Feedback Score: 6 reviews	I tried bolts but because of the twin scroll design I have very little access to the bottom side of the flange. Do you know where in particular I can buy these sized studs? Hardware store? Automotive store? Do they have to be a special because of their exposure to high temperature? p.s. - i would call peakboost and ask them what thread sizes but i heard they are currently in shambles... which is not surprising. It took me 6months to receive my manifold, turbo, wastegate. After countless hours on the phone with KEN, a BBB dispute, and multiple claims with AMEX. I finally received everything in separate shipments.. I had the manifold ceramic coated and they did a piss poor job. It chipped in one place due to poor surface preparations. I just pray to god my welds are good.

11-24-2010, 06:21 AM	#4
Colorado S14 Zilvia Member Join Date: Aug 2002 Location: Denver, CO Age: 41 Posts: 192 Trader Rating: (0) Feedback Score: 0 reviews	The peakboost manifolds are not metric threads IIRC, I think you need a domestic stud. Take it to a bolt shop and figure it out.

11-25-2010, 12:18 PM	#5
mct3351 Leaky Injector Join Date: Nov 2004 Location: Oklahoma Posts: 117 Trader Rating: (4) Feedback Score: 4 reviews	They are not metric. Take it to Ace with you, that's where I got mine. Make sure you get grade 8 or stainless nuts.

01-05-2011, 07:16 PM	#8
niscur29 Zilvia Junkie Join Date: Mar 2010 Location: Back IN FL, bring nice cars to the fail state! Age: 44 Posts: 481 Trader Rating: (14) Feedback Score: 14 reviews	I used bolts and with my precision 50 trim it was a ROYAL pain in the ass to get one of them that is almost directly under the center section. Needing a friggen crows foot, swivel, extension and it still worries me. If I ever get bored and decide to take it off im switching to studs and nuts. I do believe they were 3/8" its been a while since I replaced them with I did my build.

01-05-2011, 07:20 PM	#9
s15specR Zilvia FREAK! Join Date: Oct 2007 Location: USA Posts: 1,023 Trader Rating: (18) Feedback Score: 18 reviews	Studs are 3/8, ACE Hardware should have some decent grade ones to use temporarily.