Wastegate Spring1 x metal spring Pressure rating 0.6bar or 8.7PSI approx. Dimensions of spring 83mm x 48mm Suits: F38mm tial style wastegates or any aftermarket wastegate with the same dimensions and fittings. Will not fit MV-R or MV-S wastegates. Note: If the positioning of the wastegate is not correct the minimum boost levels will be greater than what the spring is rated. There may be a 2psi variance with new wastegate springs and the tension pressure will be more than what it is actually rated. The spring pressure tension will soften up once it has been exposed to heat over a period of time.