GSC P-D Mitsubishi 4G63T Extreme Pressure Single Conical Valve Spring & Ti Retainer Kit (Incl Seat) (5078)
Pushing the limits, breaking records, and aiming for victory? Look no further than our GSC Power-Division High Boost High RPM Valve Spring Kit for the 4G63T – the key to elevating your engine performance to unprecedented levels. Tailored for those seeking the pinnacle of power, this kit is not for street cars or sub-1,000 HP builds; for those, explore our GSC5040 or GSC5041 beehive spring kits. Engineered for the extreme, our GSC5078 kit empowers you to command the valves under intense conditions – handling 60+ psi of boost at a blazing 11,000 RPM with 12.1mm lift cams. In the fierce world of racing, where every fraction of a gram makes a difference, our redesigned Ti Retainer steals the spotlight – 10% lighter and smaller yet fortified to endure the demands of a valvetrain operating at 11,000 RPM. The GSC5078 kit doesn't stop there; it includes our GSC4041 chromoly CNC replacement valve spring seats, each 0.035" thicker than the OEM part. Versatile and practical, this kit accommodates NEW OEM valve spring keepers or our GSC1003 keeper kit. No need for specialized aftermarket locks with potential angle mismatches. The set includes 16 conical valve springs, 16 Lightweight Ti Retainers, and 16 robust CNC chromoly spring seats – your ticket to unparalleled racing performance.
Max RPM: 11,000 RPM
Max boost: 60+ psi
Applications
-
Mitsubishi Evo 1/2/3/4/5/6/7/8/9
- Mitsubishi Eclipse/Eagle Talon/Plymouth Laser
Features
| GSC5078 RACE Conical Valve Spring Kit with Ti Retainer for 4G63 | |||||
| Setup | Coil Bind (in) | Install Height (in) | Seat Pressure (lbs) | Open Pressure | Maximum Valve Lift (in) |
| HP Conical | 0.952 | 1.504 / 1.484 | 134 /140 |
275 lbs @ 12.1mm lift / 280 lbs @ 12.0mm lift |
0.476 |
To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.
Depending on the package, we ship using different carriers according to the item's location, content, and size.
Freight truck & international items, will require up to 7 business days to ship due to size and logistics.
All orders made after 3:00pm ET will be processed the next business day.
Unless otherwise noted as "In Stock" with qty amount. Pre-Orders, Special orders, & Made to order items have an estimate of 5+ weeks for USA made parts and 10+ weeks for JDM/ Overseas parts. Please check with us for exact ETA as it will vary by brand and item.
Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers, different billing, or apartment numbers will require signature if valued over $200.
Delivery Inspection & Damage Claims
Large, oversized, fragile, and performance parts must be inspected immediately upon delivery and before installation. Damage, missing parts, incorrect items, or cosmetic concerns must be reported within 3 business days of delivery with photos of the product, outer box, inner packaging, and shipping label.
Please keep all packaging until the item has been fully inspected. Claims may be denied if the item has been installed, mounted, modified, test-fitted, used, reported late, or if the packaging has been discarded.
All international orders outside of the USA are subject to duties and taxes fees per your countries jurisdiction and determined by customs. Refusal to pay duties/taxes fees prior to delivery will have the product sent back to us. This will be treated a standard return and all fees including original and refusal shipping fees will be deducted from original amount.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.
Processing and logistics on in stock international orders will take up to 7 business days to process & ship as sometimes we only have 1 international pickup a week.
In stock, non pre-orders or special order items can be returned within 30 days of the product arriving to your house or place of work.
30 days, unused. Refund = item price minus 20% restocking fee. Original shipping is non-refundable. Return shipping (if we provide label) is also deducted.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Pre-Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail
Any loan orders will have a 10% cancelation fee to cover the loan processing fees or 3rd party merchant fees. No fee will be incurred if used as store credit.
For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
GSC P-D Mitsubishi 4G63T Extreme Pressure Single Conical Valve Spring & Ti Retainer Kit (Incl Seat) (5078)
