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Free US shipping on Damond Motorsports brand products and most orders over $150
Free US shipping on DM products and most orders over $150

Mazda Turbo Oil Restrictor Banjo Bolt

Original price $ 30.00 - Original price $ 30.00
Original price
$ 30.00
$ 30.00 - $ 30.00
Current price $ 30.00
Product Description
The Damond Motorsports Turbo Oil Restrictor Bolt, reduces the oil feed to the factory K04 turbo, to help in preventing the common Mazdaspeed "smokey-turbo." Using proven and tested hole diamaters, the Damond Motorsports bolt allows proper oil feed to the factory K04 turbo, without over-oiling the turbo, and prevents oil seeping past the turbo seals into the exhaust. In addition 2 new OEM spec copper crush washers are included. This is a great, low-cost component, if you're looking to add a catless or more free flowing exhaust that would potentially result in more exhaust smoke. 

Also works with BNR turbochargers. Does NOT work on CS turbos. 


TQ spec is 18-26lbs/ft

Free US shipping! 

  • 5 stars: 102 (94%)
  • 4 stars: 5 (5%)
  • 3 stars: 0 (0%)
  • 2 stars: 1 (1%)
  • 1 star: 0 (0%)
D
Derek Dell
Another W for DM with me

Got my oil restriction bolt easy to install like 15 min if that made a big big big difference turbo don’t smoke as much yet at all big difference like I said recommend for k04 mazdaspeed

B
Bradley Turner
5 stars

As described.

Z
Zain Aziz
Review from the UK

Amazing service from Damond Motorsports. Im from UK and the moment I placed my order their was a huge panic around the world with COVID 19 - but this did not stop Damond from carrying out my order. Will definitely be ordering more from them in the future!!

M
Marcos Rivera

Nice

M
Mc Dizzle
Great product, great service

At a 127k I started to get the infamous smoky turbo. Popped off my TMIC and found oil coming out the turbo. Cleaned it up and ordered the Damond Restrictor Banjo Bolt in hopes of slowing the demise of the K04. Shortly after ordering got a shipment notification from Damond. Signed up for text alerts for shipment notifications on usps. The bolt was on its way same day. Usps alerted me when to pick up from my PO Box. 3 days after ordering I had the bolt installed. Put a few miles on it and pulled the TMIC to check for oil. Clean as a whistle. Hopefully, I caught it in time. Great product and great service is why I go with Damond.

A
Aaron Kirks
Perfect!

I recently installed the Damond Motorsports Turbo Oil Restrictor Banjo Bolt on my 2013 Mazdaspeed3, and I couldn't be happier with the experience so far.
My car had been experiencing some oil consumption and occasional exhaust smoke, particularly after idling on an incline. After researching possible causes, I decided to give Damond's restrictor bolt a try.
First impressions were excellent. The bolt arrived looking well-made, with clean machining and the necessary copper crush washers included. It's a simple component, but the quality inspires confidence.
I handled the installation myself, removing the top-mount intercooler and turbo heat shield to gain access. While reaching the factory banjo bolt takes a little patience, the actual replacement was straightforward. Everything went back together without a hitch, and the car fired right up.
Since installation, Maddy (yes, my car has a name!) has been running beautifully, with no noticeable smoke during my initial drives. I'm continuing to monitor oil consumption over time, so I won't prematurely claim it's a complete cure, but the early results are encouraging.
What I particularly appreciate is that Damond offers a thoughtfully designed solution to a known concern with these engines without requiring an expensive or complicated modification.
For fellow Mazdaspeed owners experiencing similar symptoms, this is certainly a product worth researching. Great quality, reasonable price, and a satisfying DIY project.
Very happy with my purchase. Thanks, Damond Motorsports!

J
Jaden Gragg
perfect!

i thought i wouldnt need this... after eating oil like a fat kid at a buffet i put one of these duckers in and holy moly no more choo choo train smoke whenever i gap those wrx's! approved! "mazdaspeed6 owner"

J
Joseph Donahue
Banjo bolt

Simple install that helps with failing seals.

S
Sergio Perfetti
Fits Fine

Part was delivered quickly. Took the inter cooler off and moved the exhaust heat shield over to access the oil bolt. The old one came off easy, lets see if my oil consumption is less now.

A
Angel

So far oil consumption has been reduced. Satisfied with product.

A
Alan

This is one those maintenance improvement "mods" that's worth it.

P
Patrick Brown
No more smoke

My turbo started smoking I changed this banjo bolt and no more smoke!

K
K.W.
hasnt even arrived yet and my car stopped smoking

this thing works wonders.
allegedly this will fix my brick oven mazda engine from smoking oil, now it will be just coolant :D

J
Jose

Great parts, awesome costumer service

R
R.P.
Exactly what I need for my vaping turbisky

Since my tune with my 3” steam pipe exhaust and other small things my car started smoking, changed my oil for 5w40 and it made the trick for about 3 years. Last winter the thickness of the oil was not enough to keep the it out of the exhaust, it was smoking bad like a Subaru meet cloud... I tried the banjo before changing the turbo, and it work pretty well! Easy install and solved my problem!

G
George

Turbo stopped smoking very good to get highly recommend if you’re an overthinker like me and think the worst when your turbo looks like engine failure

E
Edwin Garcia Perez Garcia Perez
Works as intended

Works as intended easy install, reduced my smokey turbo due to catless, and oil burn was reduced

M
Mathew McCain
Performed as advertised!

Did just what I needed it to do. Catless dp and full 3” straight exhaust, my ko4 was smoking like a banshee. Oil restrictor bolt has currently solved that issue.

M
Mikhail Grant
Bolt

It has worked wonders for my smoking problem accompanied with some oil additive my car doesn’t even smoke almost at all anymore

A
Alexandre Metz
Work as intended

Easy to install, good quality product. Nothing to complain

D
Dylan Pearson
Great bandaid

I purchased this bolt probably 6 years ago now and it took until now for my junk stock turbo to start smoking people out again. To me, that makes it a $0.42 monthly subscription to not have a smoking turbo. Well worth it. Super easy install. Probably not even worth doing the review since anyone with a K04 has already done this but its definitely a product I would recommend, especially as a temporary fix.

N
Nate Resendes
works as advertised

always good products from DM.

A
Austin Spruill
Awesome!!!

This bolt is literally the best investment you can do! My ko4 has early signs of turbo seal wear and ever since i installed this bolt my car has been running a lot smoother! I’ll admit it’s not a permanent fix but it will extend the life of your turbo and help your car run more efficiently! Definitely a 5 star! And the shipping was unbelievably fast!

S
Steve Bolan
Ms3 Banjo bolt

So far so good. Easy install and everything is running smoothly like it should.

J
Jesse Smith
Definitely a must do

Love this product super easy to install definitely would recommend it to anyone who needs one

P
Pj Gavin

Works amazing had hella white smoke before and the turbo wouldn’t really kick as hard but now she running prime deff recommend

D
Dany m
Very nice

packaged well and in perfect condition…works great!!!!!

N
Nathan Schommer
Banjo bolt

This mod is essential if you’re catless. My car has higher km’s (212k) do be exact and a combination of this bolt and 5w40 full synth oil fixed my smoking and oil consumption issues! It is cold below 0 in Canada at the moment and I do get a lot of smoking regardless, but it made it a lot better!!

M
Madison Bernardez
Great

Worked slowed down lol feed to turbo and way less smoke ty