IS300 Customization Gallery
Intake Air Filter Insulation
What happens when you add 2,000°F insulation to separate the air filter from the engine heat — by also sealing it to the hood?
The end result is a turbo that doesn't work as hard. Warmer air takes more energy to compress, so the turbo works harder than necessary with warm intake air.
Before the insulation:
My intercooler cooled the air to near outside air temps of around 85°F (according to my air temp sensor in front of the throttle body).
BUT the ambient air temperature sensor in front of my turbo measured temps of +120°F with only a tiny plastic shield (even though it sealed to the hood).
After the insulation:
Now I'm seeing only 2 or 3 degrees F above outside air temp PRE-turbo, and my car feels noticeably more peppy.
Outside of that, it's just plastic and thin aluminum sandwiching the insulation together.
A-Premium Alternator Compatible with Toyota Sequoia 2003 2004 2005 2006 2007 2008 2009 V8 4.7L, 12V 150Amp Clockwise 6-Groove Pulley, Replace# 27060-0F050, 104210-3390, 104210-5500
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Alternator Regulator 4-Pin FR-IG-L-S Connector Pigtail, OE 90980-11964 Compatible with Toyota 4Runner/Avalon/Camry/Corolla/Highlander/Land Cruiser/RAV4/Tacoma/Tundra/Yaris, Lexus ES/GS/is/RX
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A-Premium Disc Brake Caliper Assembly Compatible with Select Lexus Models - IS200t, IS300, IS350, GS200t, GS300, GS350, GS430, GS450h, GS460, RC200t, RC300, RC350 2008-2021 - Front Left Driver
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A-Premium Disc Brake Caliper Assembly Compatible with Select Lexus Models - IS200t, IS300, IS350, GS200t, GS300, GS350, GS430, GS450h, GS460, RC200t, RC300, RC350 2008-2021 - Front Right Passenger
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Ceramic Fiber Insulation, 1" Thick x 16" x 48", 2400F Fireproof Insulation Blanket, 3026E
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A-Premium Alternator Compatible with Toyota Sequoia 2003 2004 2005 2006 2007 2008 2009 V8 4.7L, 12V 150Amp Clockwise 6-Groove Pulley, Replace# 27060-0F050, 104210-3390, 104210-5500
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Alternator Regulator 4-Pin FR-IG-L-S Connector Pigtail, OE 90980-11964 Compatible with Toyota 4Runner/Avalon/Camry/Corolla/Highlander/Land Cruiser/RAV4/Tacoma/Tundra/Yaris, Lexus ES/GS/is/RX
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A-Premium Disc Brake Caliper Assembly Compatible with Select Lexus Models - IS200t, IS300, IS350, GS200t, GS300, GS350, GS430, GS450h, GS460, RC200t, RC300, RC350 2008-2021 - Front Left Driver
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A-Premium Disc Brake Caliper Assembly Compatible with Select Lexus Models - IS200t, IS300, IS350, GS200t, GS300, GS350, GS430, GS450h, GS460, RC200t, RC300, RC350 2008-2021 - Front Right Passenger
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Ceramic Fiber Insulation, 1" Thick x 16" x 48", 2400F Fireproof Insulation Blanket, 3026E
Buy on Amazon As an Amazon Associate I earn from qualifying purchases2006+ IS350 Front Brake Upgrade on IS300
The IS350 came stock with Advics front calipers. These 13.1-inch diameter vented rotors mixed with the 4-pot 44.5mm pistons in the Advics calipers provide a great increase to your stopping power compared to the OEM IS300's front brakes — which have a 1.5-inch smaller diameter with the same caliper clamping force.
This upgrade provides a 25% increase to your front brake effectiveness. BUT this will shift your brake bias from a 70% front bias to a 75% front bias (calculations are in the brake formula section of this website).
If your ABS has been bypassed, your front brakes will be more likely to lock up compared to OEM. The bias can be corrected on the rear by upgrading to 0.5 Coefficient of Friction pads (like these DP3848C from EBC).
Upgrading the rear pads along with the front Advics calipers (on stock IS350 pads) keeps your bias closer to normal at 69% front bias by increasing your rear grip roughly 26% over OEM.
They do not fit Enkei RPF1s (pictured) without extreme shaving.
Most 17" wheels fit.
Highlander Alternator Installation on 2JZ
This is not an overly complicated installation.
The Highlander (03-07) and the Sequoia (03-08) use similar alternators, both of which are a higher amperage rating than the OEM IS300 (90A) and Supra (100A).
By shaving approx 5mm off of the top ear of the alternator, you have a 130A or 150A alternator.
This alternator requires a repin from 3-pin to 4-pin, a different connector, and a few inches of wire extension (not overly complex) or the pigtail can be purchased from PHR 2UZ alternator adapter harness.
A-Premium Alternator Compatible with Toyota Sequoia 2003 2004 2005 2006 2007 2008 2009 V8 4.7L, 12V 150Amp Clockwise 6-Groove Pulley, Replace# 27060-0F050, 104210-3390, 104210-5500
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Alternator Regulator 4-Pin FR-IG-L-S Connector Pigtail, OE 90980-11964 Compatible with Toyota 4Runner/Avalon/Camry/Corolla/Highlander/Land Cruiser/RAV4/Tacoma/Tundra/Yaris, Lexus ES/GS/is/RX
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Radium 20-0215 Top Feed Fuel Rail, 2Jz-Gte
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Injector Dynamics ID1050X for Toyota Supra Turbo 93-98 / 2JZ-GTE 14mm Set of 6
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Radium Engineering Fuel Rail Compatible with Toyota 1JZ-GTE VVT-I
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A-Premium Alternator Compatible with Toyota Sequoia 2003 2004 2005 2006 2007 2008 2009 V8 4.7L, 12V 150Amp Clockwise 6-Groove Pulley, Replace# 27060-0F050, 104210-3390, 104210-5500
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Alternator Regulator 4-Pin FR-IG-L-S Connector Pigtail, OE 90980-11964 Compatible with Toyota 4Runner/Avalon/Camry/Corolla/Highlander/Land Cruiser/RAV4/Tacoma/Tundra/Yaris, Lexus ES/GS/is/RX
Buy on Amazon As an Amazon Associate I earn from qualifying purchases
Radium 20-0215 Top Feed Fuel Rail, 2Jz-Gte
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Injector Dynamics ID1050X for Toyota Supra Turbo 93-98 / 2JZ-GTE 14mm Set of 6
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Radium Engineering Fuel Rail Compatible with Toyota 1JZ-GTE VVT-I
Buy on Amazon As an Amazon Associate I earn from qualifying purchasesBosch ID1050X, Radium 14mm Rail, Greddy FFIM
The intake manifold I purchased used off of a Supra locally on Craigslist — it had seen approximately 20 years of use. After sandblasting and powder coating, it looked brand new again.
The Radium parts (fuel rail, injector pulse damper, fuel pressure regulator, and pressure gauge) add a touch of elegance.
The Bosch 82mm throttle body on the front of the Greddy intake manifold curves around the OEM IS300 power steering reservoir perfectly!
Removable Intake Manifold Assembly (Intact)
This took quite a bit of planning, removing, and reinstalling, but I finally got it!
It's now removable by simply:
- Removing the fuel lines
- Removing the vacuum lines
- Unclamping the intake
- Removing the bolts and nuts that hold it to the engine head
It's extremely easy to remove now. It's unfortunate this is such a hard intake manifold to find — I wish I could set up more 2JZs like this! So easy to remove and reinstall while keeping all of the parts connected to the manifold!
